在平直的轨道上,甲、乙两车相距为s,同向同时开始运动.甲在后以初速度v1,加速度a1

题型:多项选择题

问题:

在平直的轨道上,甲、乙两车相距为s,同向同时开始运动.甲在后以初速度v1,加速度a1做匀加速运动,乙在前作初速度为零,加速度为a2的匀加速运动.假定甲能从乙的旁边通过而互不影响,下列情况可能发生的是()

A.a1=a2时,甲、乙只能相遇一次

B.a1>a2时,甲、乙可能相遇二次

C.a1>a2时,甲、乙只能相遇一次

D.a1<a2时,甲、乙可能相遇二次

考点:高中物理追击相遇问题追击相遇问题题库
题型:多项选择题

( )家族旅行の計画を立てたのに、また父の仕事で行かれなくなってしまった。

A.わざと

B.かなり

C.せっかく

D.なにも

题型:多项选择题

[听力原文] 丈夫和妻子在家里。妻子说:“你好好学一下洗碗机的用法吧。”丈夫说:“不用了,我不想再学了,学会了洗衣机的用法后,我已经够麻烦的了!”()

A.洗衣机很有用 

B.丈夫不喜欢做家务 

C.丈夫不喜欢用洗衣机 

D.丈夫不喜欢用洗碗机

题型:多项选择题

The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.

Is integer x divisible by 48 ?()
(1) x is divisible by 16.
(2) x is divisible by 12.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

题型:多项选择题

建筑周边外侧的安全网要求是什么?

题型:多项选择题

1/5,2/25,3/125,( )

A.4/3125

B.4/250

C.6/750

D.4/625

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