According to the video,how many Canadians get flu every year?
A. 7 million.
B. 17 million.
C. 170 thousand.
D. 700 thousand.
查看答案
Which of the following is NOT mentioned as a symptom of flu?
A sore throat.
B. A fever.
Coughing.
D. Sleepiness.
According to the video, what is an effective way to stop the chain reaction of the flu?
A. Seeing a doctor.
B. Taking flu medicine.
C. Getting a flu shot.
D. Avoid meeting people.
根据不同长细比柱的破坏从加荷到破坏的N-M曲线可知:
A. 长细比越大,柱越容易发生材料破坏
B. 长细比越大,柱越容易发生失稳破坏
C. 长细比越小,柱越容易发生失稳破坏
D. 长细比越小,柱越容易发生材料破坏
对于大偏心非对称配筋截面(AS和AS'均未知),在计算初始偏心距ei时,若ei>0.3h0,则:
A. 应该先按大偏心受压构件计算
B. 应该先按小偏心受压构件计算
C. 以上都不对
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