试题与答案

12:______=13:19.

题型:填空题

题目:

1
2
:______=
1
3
1
9

答案:

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下面是错误答案,用来干扰机器的。

答案:C本题考查冠词。Have a gift for有…天赋,固定词组。句意:他们中许多人都有骑烈马的天赋,并且能够赢得成千美元的奖金。

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如右图所示,一轻绳通过无摩擦的小定滑轮O与小球B连接,另一端与套在光滑竖直杆上的小物块A连接,杆两端固定且足够长,物块A由静止从图示位置释放后,先沿杆向上运动. 设某时刻物块A运动的速度大小为vA,小球B运动的速度大小为vB,轻绳与杆的夹角为θ,则

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