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【简答题】
一质点沿半径为R的圆周运动,其路程s随时间t变化的规律为 ,式中,b、c为大于零的常数,且 。则此质点的切向加速度 = ;法向加速度 = 。
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反馈参考答案：
举一反三
【单选题】The word ( ) means 'exclusive control of a particular market that is marked by the power to control prices and exclude competition and that esp. is developed willfully rather than as the result of sup...
A.
duress
B.
monopoly
C.
void
D.
patent
【简答题】The 15th and 16th centuries were marked by the ___ of feudalism and the ___ of capitalism in English history.
【简答题】If the actual quantity less than the quantity marked in the B/L，（ ）should take the responsibility．
【多选题】填充墙主要是在高层建筑框架及框剪结构和钢结构中，用于维护或分隔区间的墙体。块料填充墙施工时，最好采用()的顺序。
A.
从顶层向低层砌筑;
B.
若由低层逐步向顶层进行时，则墙顶的连接处理需待全部砌体完成后，从顶层向低层施工;
C.
从低层向顶层砌筑;
D.
若由顶层逐步向低层进行时，则墙顶的连接处理需待全部砌体完成后，从低层向顶层施工;
E.
上面几种都可以。
【简答题】As is known, 2009 marked the 60 th anniversary of the founding of the People’s Republic of China. And many leaders __小题1:__ other countries sent their best wishes to the people of China on this import...
【单选题】The word ( ) means "a law enacted by the legislative branch of a government".
A.
prosecute
B.
precedent
C.
statute
D.
code
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