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【单选题】
一个完整的液压传动系统由五大部分组成,其中液压缸属于( )。A.
动力元件
B.
执行元件
C.
辅助装置
D.
控制元件
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举一反三
【单选题】She worked hard at her task before she felt sure that the results would ______ her long effort.
A.
justify
B.
testify
C.
rectify
D.
verify
【简答题】The girl worked so hard that (ual) ______ she made herself seriously ill.
【简答题】A．She worked hard and was successful. B．She lived a poor life in the past. C．She needs much sleep. D．Both A and B
【单选题】She worked that hard just for wanting to _________ the most excellent student.
A.
outstrip
B.
overrun
C.
outcome
D.
outlook
【单选题】Susan worked very hard and she picked _____ oranges of all the children on the farm.
A.
most
B.
the most
C.
more
D.
more and more
【单选题】一个由 4 个构件组成的 机构一共有 ______ 个瞬心,其中有 ______ 个绝对瞬心,有 ______ 个相对瞬心。
A.
6 ， 3 ， 3
B.
4 ， 2 ， 2
C.
6 ， 4 ， 2
D.
4 ， 1 ， 3
【简答题】阅读理解。 The story is about a young student. She worked very hard at her lessons. She worked so hard that she became ill. She couldn't go to sleep at night. But when she got up the next morning, she felt...
【简答题】Connie was told that if she worked too hard, her health would ________. A) deteriorate B) descend C) degrade D) decay
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