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【单选题】
液压缸是将液压泵输出的压力能转换为机械能元件,它主要输出( )运动。A.
旋转
B.
曲线
C.
直线和摆动
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举一反三
【单选题】Joe Jones, the eldest of the eight children, had to ________ out of high school at the age of 16 to help his father on the farm.
A.
leave
B.
drop
C.
fall
D.
go
【单选题】We students are so busy with our homework that we have no time for outdoor exercise, ______ we have the desire.
A.
wherever
B.
whenever
C.
even if
D.
as if
【简答题】We are not _f______ ，but very busy now．
【简答题】供食用的新鲜的猪五花肉(猪腹部的肉),不带骨头
【单选题】We______ you more help then, but we were so busy at that time.
A.
ought to have given
B.
musthave given
C.
might havegiven
D.
need have given
【单选题】Joe Jones, the eldest of the eight children, had to ______out of high school at the age of to help his father on the farm.
A.
leave
B.
drop
C.
fall
D.
go
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