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【单选题】
与普通螺旋传动机构相比，滚珠螺旋传动机构的特点是（）。A.
传动效率高、承载低
B.
摩擦阻力小、不能自锁
C.
动作灵敏、有冲击
D.
结构复杂、尺寸小
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【单选题】I met this guy _____ some other occasions but he did not seem to recognize me.
A.
for
B.
on
C.
at
D.
in
【单选题】An excellent teacher is believed to be one who devotes himself to the children but asks for nothing _______.
A.
in return
B.
in advance
C.
in short
D.
in turn
【简答题】阅读理解。 It is true that shyness can be a disadvantage socially for those who suffer from it seriously. I mean real shyness, not somebody who is simply quiet. Quiet people could be shy, but on the other ...
【简答题】SQL语句中的条件用以下哪一项来表达( ) A.THEN B.WHILE C.WHERE D.IF
【简答题】In Daniel Kahneman's autobiography, he described a situation where he was teaching flight instructors about skill learning, and a seasoned instructor in the audience raised his hand and said: "On many...
【单选题】An excellent teacher is believed to be one who devotes himself to the children but ask for nothing ________.
A.
in turn
B.
in advance
C.
in short
D.
in return
【简答题】阅读理解。 Are you planning your first visit to a music festival? This article offers insights (洞察力) into what you might expect to find as well as some tips on how to make the most of your day. Having expe...
【单选题】“There were many occasions,” he recalls, “when I willingly _______ on food and other expenses in order to be able to afford some rare books that I liked.”
A.
cut out
B.
cut back
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