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【单选题】
A prefix or suffix is underlined in each item below. Choose the correct for the prefix or suffix. companion shipA.
one who
B.
full of
C.
state of being
D.
without
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【简答题】为何要限制小带轮的最小直径?
【简答题】带传动设计中,为何要限制小带轮的最小基准直径?
【单选题】We are offering you firm________ on the same terms and conditions as the previous contract.
A.
as following
B.
as follow
C.
as is following
D.
as follows
【单选题】We ___________ on it for many hours, but we have not yet reached any conclusion. A. are being worked B. are working C. have been working D. have been worked
A.
are being worked
B.
are working
C.
have been working
D.
have been worked
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