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【判断题】
电刷的压力可用刷握上的弹簧来调整，各电刷压力之差不应超过±10%。A.
正确
B.
错误
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举一反三
【单选题】The machine will continue to make much noise ___ we have it repaired.
A.
when
B.
bacause
C.
if
D.
unless
【单选题】The machine will continue to make much noise ______we have it repaired.
A.
when
B.
because
C.
if
D.
unless
【简答题】2 Complete the sentences. ► Make sure ____ you keep your receipt. 1 We were very ____ with the slow service,
and in the end we ____ about it. 2 You often get a two-year ____ with a new
w...
【简答题】In earliest times, men considered lightning to be one of the great mysteries (神秘的事物) of nature. Some ancient peoples believed that lightning and thunder were the weapons (武器) of the gods. In reality, ...
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