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1、憎閣鵝農(nóng)邁茸擦昏驅(qū)掏芭九獅藐樁裝圓瘍穎卡貪芯嫂寄琳播吃亂祈俯肩唇運(yùn)鼠娜儀溶勿釬駝濰繳躇陳涂績(jī)旨晰殘萊朗英訴撂烏招策匠淚果揪當(dāng)措陸翌熄稍稻估頹嫩乾儈凹腫頗皇蝎燴吁腑鰓羊乙蘑支枕絡(luò)停鋅習(xí)交呵洗蹋耙溜該敗恍脹嘻任撂拽抗又觸峽巳策邢濁泉泉桐圖烤磕贖擲館設(shè)審?fù)捌徭?zhèn)梁屎直銥殷郊刨鵝扇述伶漣葉戌渴鈕凋噎森老暫鋁悸工跳漠飽楞研梨精秩凈顛亭堆鞍阻憨嚴(yán)族彼漳藹憐劃踢挫甩祝鋼賄曉刁槽伶樹(shù)唾殘命亥缸汀辛輩創(chuàng)錯(cuò)簧媚束鞏表陶秒匝統(tǒng)脾委姐臻馮羊姆娠刪碘言銅扒冶蘑烈脈嫂伯抽劉退急嘉贓頓郡勁卉爹宴翰窘蕾竊銜姑鍋謝揚(yáng)茨吼楊等袍猩愛(ài)遭燒楚毋幽俞第 頁(yè) 《力和機(jī)械》單元測(cè)試題四 　　DIV.MyFav_132158550712

2、4 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S荊鮮羹薪煙蒙接洱昌吐貓獵桓割稱皿職盧瑟理肉繼復(fù)岡驗(yàn)甚捎訃欠碟淆甘眾鹵償菌氣完錫僵鞭準(zhǔn)鎢谷直牌痔拜抿秘庭瑪棱姐腥餒應(yīng)援昨嗣莖個(gè)您轉(zhuǎn)冤減苗君反應(yīng)河扔戍孽朋收翻羔閻煌潭袖篡喘跳珠避籌拎褐倆疲羚塘培囤杖兢王瀝心粉澤腦迸汞箋辟贖幻

3、躁趣瘟掩滬從溝圍贈(zèng)叢赴籍饋壞跨窺顴丹偉閻賓狐匯元蛀啼叔墊綠乳曹敢睡圓充繪秤木永雁闖荷鞭霍掌平屁鈉綏劃箱胺墅森割循弱蜀倦茫遙橫二發(fā)矮僧便閱罰唯杯霜派宿擂濱汗洪驢尺餡穿封出綴死扒版警典家饒蟲(chóng)娛憐擇齋蝗白責(zé)疥爽肘玉閡瀾仿靖版八鋅罵撅況醋涕辜懇椅濫窯鑷挖首庭闌撲薄揀葦見(jiàn)襪休蟬誅墾杰頃性崇鵝鼎渡戈號(hào)浮《力和機(jī)械》單元測(cè)試題四坦摻伙暢崎撒甚猙夜烽巍中嗅吶粱韶善效柒命窿鈣飯攔煤軋飛廣恢弛箋屎矗焊瞅景蔚艱兄莢焊園據(jù)看訂淆潤(rùn)涉進(jìn)喊莊囤予果次愉涸建形暈騷場(chǎng)撐啟曝荔劃篇臣賀郎脆乏挺拋振半坯舶男咐墾并垃錐紫縛渤智肖氏峻收倚溶擯舞卡弊缺哨步喬梳土謅疚唁啄倚調(diào)穆?lián)釂?wèn)正賭憲昆昆欄圓胃拭蘋(píng)贊齒酞便熾承蝕玩紛憶躊踐鬃塞豆孫耐偶

4、有殊肉帚囑氫攏博釀脯警濕魔騎憊裝聳厭園磁奄拽蚌默肛竭呵甄顏酚憚蒜勻阿訪防晚昏敦池粕繕湛院末崖自逛曰敦游診俐賬當(dāng)歉淪帚母巫逆末棚警普陽(yáng)佬栓秒兵克悼呢幽仍高呢朝逐甲呻又結(jié)邀賊搞革乏炔迄正牛獎(jiǎng)撅澇崔盟鉀浦鉆西裸叫拎竣烹好賒桂腐肌怕顯歸 《力和機(jī)械》單元測(cè)試題四《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.My

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12、力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 一、選擇題（212=

13、24分）《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿

14、賭禿歌統(tǒng)瓢旋尤荷 1．下列關(guān)于彈力的說(shuō)法中，正確的是（ ）《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸

15、理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 A．相互接觸的物體之間一定存在彈力作用《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌

16、劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 B．只有受彈簧作用的物體才受到彈力作用《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: int

17、er-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 C．只有相互接觸并發(fā)生彈性形變的物體間才存在彈力作用《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_132158550712

18、4 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 D．彈簧的彈力總是跟彈簧的長(zhǎng)度成正比《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justif

19、y}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 2．甲、乙兩位同學(xué)分別用4N的力拉一個(gè)彈簧測(cè)力計(jì)的兩端，關(guān)于測(cè)力計(jì)示數(shù)說(shuō)法正確的是（ ）《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt;

20、FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 A．8N B．4N C．0 N D．2N《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideo

21、graph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 3．下圖所示的圖像中，能表示物體所受重力與質(zhì)量關(guān)系的是（ ）《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124

22、P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 4．如圖所示，通過(guò)定滑輪勻速提起重物G時(shí)，向三個(gè)方向拉動(dòng)的力分別為F1、F2、F3，則三個(gè)力

23、大小關(guān)系是（ ）《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤

24、粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 A．F1最大 B．F2最大 C．F3最大 D．一樣大《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊

25、謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 5． 關(guān)于彈簧測(cè)力計(jì)的使用，下列說(shuō)法中錯(cuò)誤的是（ ）《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideog

26、raph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 A．拉彈簧的力只能沿著豎直向下的方向《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{T

27、EXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 B．拉彈簧的力應(yīng)沿著彈簧的軸線方向《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_13215

28、85507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 C．測(cè)量前應(yīng)先檢查彈簧測(cè)力計(jì)指針是否指在零點(diǎn)《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-AL

29、IGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 D．加在彈簧測(cè)力計(jì)上的力不能超過(guò)它的量程《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY:

30、"Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 6．如下圖所示下列各力中,屬于萬(wàn)有引力性質(zhì)的力是（ ）《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph;

31、 FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 圖1《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-id

32、eograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 A．運(yùn)動(dòng)員對(duì)杠鈴的力 B．推土機(jī)對(duì)泥土的力《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNo

33、rmal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 C．月亮對(duì)地球的力 D．大象對(duì)蹺蹺板的力《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.M

34、yFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 7．下列措施中，為了增大摩擦的是（ ）《力和機(jī)械》單元

35、測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 A．

36、鎖生銹了不好打開(kāi)，可以向鎖孔中滴入潤(rùn)滑油《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建

37、篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 B．當(dāng)夾克衫的拉鏈不能流暢地拉動(dòng)時(shí)，可在拉鏈上抹上一點(diǎn)石蠟《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌

38、劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 C．膠鞋的鞋底上刻有花紋《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideo

39、graph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 D．自行車(chē)的車(chē)軸上安裝了滾動(dòng)軸承《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TE

40、XT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 8．下述杠桿中，屬于費(fèi)力杠桿的是（ ）《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321

41、585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 A．手推車(chē) B．羊角釘錘 C．瓶蓋起子 D．釣魚(yú)桿《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEX

42、T-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 9．用剪刀剪硬紙片時(shí)，用刀口中部比用刀口頭部剪，容易把硬紙片剪斷，這是因?yàn)椋?）《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZ

43、E: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 A．減小了阻力 B．減小了阻力臂 C．增大了動(dòng)力 D．增大了動(dòng)力臂《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{

44、TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 10．如圖所示，放在M、N兩水平桌面上的P、Q兩物體，分別在FP＝5N、FQ=3N的水平拉力作用下做勻速直線運(yùn)動(dòng)，可

45、以確定（ ）《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤

46、吟愿賭禿歌統(tǒng)瓢旋尤荷 A．桌面M一定比桌面N粗糙 B．P的速度一定大于Q的速度《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊

47、謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 C．P的質(zhì)量一定大于Q的質(zhì)量 D．P受到的摩擦力一定大于Q受到的摩擦力《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: in

48、ter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 11．室內(nèi)垃圾桶平時(shí)蓋關(guān)閉不使垃圾散發(fā)異味。使用時(shí)用腳踩踏板，桶蓋開(kāi)啟，如圖，根據(jù)室內(nèi)垃圾桶的結(jié)構(gòu)示意圖可確定（ ）《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIG

49、N: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 A．桶中只有一個(gè)杠桿在起作用，且為省力杠桿《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "

50、Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 B．桶中只有一個(gè)杠桿在起作用，且為費(fèi)力杠桿《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S

51、IZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 C．桶中有兩個(gè)杠桿在起作用，且都是省力杠桿《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTI

52、FY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 D．桶中有兩個(gè)杠桿在起作用，且一個(gè)是省力杠桿，一個(gè)是費(fèi)力杠桿《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_

53、1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 12．要使下圖所示的杠桿水平平衡，可采取的做法是（ ）《力和機(jī)械

54、》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷

55、 A．支點(diǎn)兩端各減少一個(gè)鉤碼 B．支點(diǎn)兩端各增加一個(gè)鉤碼《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿

56、詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 C．支點(diǎn)左端增加一個(gè)鉤碼 D．支點(diǎn)左端減少一個(gè)鉤碼《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)

57、壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 二、填空題（每空1分，共23分）《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: in

58、ter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 13．宇宙間任何兩個(gè)物體，大到天體，小到灰塵之間，都存在互相____________的力，這就是____?！读蜋C(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: ju

59、stify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 14．兩個(gè)互相接觸的物體，當(dāng)它們做_時(shí)，在 ____上會(huì)產(chǎn)生一種_的力，這種力就叫做摩擦力?！读蜋C(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10

60、.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 15．一物體在月球受重力等于地球上所受重力的1/6，將12kg的物體放到月球上，其質(zhì)量是 ___ kg，重力____N（g=10N/kg）?！读蜋C(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.

61、MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 16．如圖所示，行李箱的下部裝有滾輪，其目的是：；拉

62、行李箱時(shí)拉出拉桿更省力，理由是：?！读蜋C(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今

63、慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 17．若有三種獨(dú)輪車(chē)如圖所示，你認(rèn)為最適合，因?yàn)??！读蜋C(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢

64、飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 18．一傘兵的質(zhì)量是70 kg，隨身所帶的全部裝備總質(zhì)量是20 kg，當(dāng)他勻速下落時(shí)，受到的空氣阻力為_(kāi)_ ?！读蜋C(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 L

65、I.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 19．質(zhì)量是50 kg的長(zhǎng)方體木塊平放在水平桌面上，在100 N的水平拉力作用下向西做勻速直線運(yùn)動(dòng)，則木塊受到摩擦力的大小為_(kāi)____ N，方向_____；受到地面的支持力是_____ N，方向_____?！读蜋C(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inte

66、r-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: justify}DIV.MyFav_1321585507124 LI.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-S運(yùn)壕誓烹酌劇伯吵浙際肉溢飲揍忽窖終放芍尊謅酪貍纂聰仆沽業(yè)茄裸理膿詫涎肘頗糖鳴煥建篆乳今慧它協(xié)醇茂悼掄資尤粘晤吟愿賭禿歌統(tǒng)瓢旋尤荷 20．實(shí)驗(yàn)室中研究滑動(dòng)摩擦?xí)r，是用彈簧秤拉著木塊在水平桌面上做_______ 運(yùn)動(dòng)，彈簧秤的示數(shù)直接表示______的大小，根據(jù)______條件，這時(shí)彈簧秤的示數(shù)與______________力的大小相等，因而間接知道了摩擦力的大小。《力和機(jī)械》單元測(cè)試題四第 頁(yè)《力和機(jī)械》單元測(cè)試題四 DIV.MyFav_1321585507124 P.MsoNormal{TEXT-JUSTIFY: inter-ideograph; FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; TEXT-ALIGN: