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]
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.
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.
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
微信支付 
支付宝支付