题目内容

News Report Three[音频]

A. The final test was too difficult for the students.
B. The Minister strengthened thesecurity of the testing places.
C. The scoring system broke down by accident.
D. The students didn't prepare enough for the test.

查看答案

搜索结果不匹配？点我反馈

更多问题

News Report Three[音频]

A. He thinks it is crucial to the economic development.
B. He thinks it is crucial to the humane development.
C. He thinks it is crucial to the social morality.
D. He thinks it is crucial to ending the political bribery.

查看答案

News Report Three[音频]

A. They will be suspended from school.
B. They will be degraded.
C. They will have a second chance to take the test.
D. They will be set as bad examples.

查看答案

在由N个构件组成的机构中,有__个相对瞬心,有个绝对瞬心。(4.0)

A. N(N−3)/2 ,N
B. N(N−1)/2,N−1;
C. N(N−1)/4 ,N(N−1)/4
D. N ,N(N−3)/2

查看答案

‌有关速度影像和加速度影像原理及应用的一些表述如下,试选择其中的正确表述( )。(4.0)

A. 速度影像的相似原理只能应用于构件上的各点,而不能应用于整个机构上的各点
B. 速度影像和加速度影像原理的实质是构件的速度图形和加速度图形与其位置图形之间的相似原理,因此其应用只要满足相似原理即可
C. 利用速度影像或加速影像原理确定作平面复合运动构件上各点绝对速度或绝对加速度,只要确定作该构件的各点的速度影像或加速度影像即可
D. 应用速度影像或加速度影像原理作机构的速度或加速度分析的条件:一是必须已知机构原动件的速度或加速度;二是必须选择合适的构件

查看答案

News Report Three[音频]

A. The final test was too difficult for the students. B. The Minister strengthened thesecurity of the testing places. C. The scoring system broke down by accident. D. The students didn't prepare enough for the test.

News Report Three[音频]

News Report Three[音频]

在由N个构件组成的机构中,有______个相对瞬心,有____个绝对瞬心。(4.0)

‌有关速度影像和加速度影像原理及应用的一些表述如下,试选择其中的正确表述( )。(4.0)

A. The final test was too difficult for the students.
B. The Minister strengthened thesecurity of the testing places.
C. The scoring system broke down by accident.
D. The students didn't prepare enough for the test.

在由N个构件组成的机构中,有__个相对瞬心,有个绝对瞬心。(4.0)