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【简答题】
如图所示，半径为r的均质圆柱体A，绕以细绳后放在倾角为θ的光滑斜面上，细绳的另一端绕过定滑轮O后吊有重物B。已知圆柱体和重物的质量分别为m 1 和m 2 ，滑轮质量不计。试求圆柱体质心和重物的加速度。
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皮皮学刷刷变学霸
举一反三
【单选题】大多数医疗保险合同中都规定有比例给付条款,该条款规定对医疗费用中超过免赔额的部分,采用保险人与被保险人共同分摊的比例给付办法,该条款不利于( )
A.
增加被保险人的费用意识
B.
促使被保险人主动地减少对医疗服务的利用
C.
减少保险金的给付
D.
提高对被保险人的保障程度
E.
此答案无效
【单选题】.The government was believed to be considering _____ a law _____ it a crime to import any kind of weapon.
A.
to pass …. to making
B.
to be passing …. to make
C.
passing … made
D.
passing….making.
【单选题】把蜗轮驺装入箱体内，涡杆位置已由箱体决定，要使涡杆位于涡轮轮齿对称中心面内，只能通过硬（）来调整。
A.
改变箱体孔中心位置
B.
改变涡轮调整玷片厚度
C.
报废
D.
改变把轮邹车细加偏心套改中心位置
【简答题】We're ______ a position to take good care Of your import business as a buying agent．
【简答题】根据音标写单词。 A good ['brekf?st] is import.ant. We can ['i:zili] __ understand it. We have not eaten ['eniθi?] for about twelve hours by breakfast time. Our bodies need food for ['m?:ni?] activities. One g...
【单选题】As we all know,import is as important as exports,because_____.Which of following is NOT ture?
A.
import can provide products or services that the domestic market cannot provide.
B.
import can force the local firms try their best to innovate.
C.
import can force the local firms improve product’s quality.
D.
imports will hinder world economic growth absolutely.
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