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【单选题】
一弹簧振子的固有周期为 T ,若将弹簧剪去一半,振子的质量也减半,则新弹簧振子的固有 周期为( )A.
T
B.
2T
C.
T /2
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举一反三
【单选题】What does “She wisely refused to answer such a silly question” mean?
A.
She refused to answer such a silly question in a wise manner.
B.
It was wise of her to refuse to answer such a silly question.
C.
She refused, in a wise manner, to answer such a silly question.
D.
She was tired and didn’t want to answer anything.
【简答题】She was ______ (shame) of having asked such a silly question.
【单选题】What did the woman mean by saying 'How silly of me'?
A.
She meant it was silly of her not to attend the lecture.
B.
She meant it was silly of her to blame the students.
C.
She meant it was silly of her to mix up the dates of the lectures.
【简答题】She felt _____ of having asked such a silly questionwhen the audience couldn’t help laughing. A. guilty B. crazy C.miserable D. ashamed
【单选题】当白金电极的电极间隙不符合规格时,应当执行下列哪一个正确程序
A.
用螺丝刀或其他类似的工具将侧电极折弯,使之得到调整
B.
通过用锤子锤击侧电极,调整电极间隙
C.
如果间隙很窄,通过去掉一部分中心电极,调整间隙。
D.
更换火花塞
【简答题】Fencing has a long (1) as a modern Olympic . It is one of the five (2) which have been featured in every one of the modern Olympic (3) . In the Middle Age, a boy took more than ten years (4) fenc...
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