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【单选题】
静力练习时肌肉的用力形式是（）。A.
向心收缩
B.
离心收缩
C.
等长收缩
D.
等动收缩
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【简答题】You ______ worry so much. It doesn't do you any good. Either you get the job, or you don't. If you don't, just apply for another one. ually, you will find work.(can't/ shouldn't/don't have to)
【单选题】听力原文：M: I don't like picnics because hamburgers and salad are so messy. W: You worry too much about how you look. It doesn't matter if your fingers get a little dirty once in a while. Q: Why doesn't t...
A.
He doesn't like to eat outdoors.
B.
He prefers to eat with a knife and fork.
C.
He has to eat with his hands.
D.
He hates hamburgers and salad.
【简答题】四显示自动闭塞区段,通过色灯信号机显示下列信号,一个黄色灯光——要求列车减速运行,按规定限速要求越过该信号机,表示运行前方有一个闭塞分区( )
【单选题】I will help you, so you_____worry about it.
A.
don’t need
B.
needn’t to
C.
needn’t
D.
not need
【简答题】处理斜板常用的功能是( ),板下面的柱、梁、墙等构件的标高可以通过( )功能快速的调整过来。
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