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【单选题】
Hazards from a noisy machinery can be reduced by:A.
keeping it in good condition
B.
putting it in a sound absorbing box
C.
isolating it from people not involved
D.
All of the above
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举一反三
【单选题】要改变电容分相式单相异步电动机的转向,应______。
A.
调换电机的两根进线
B.
调换工作绕组的始末端两根进线
C.
同时调换工作绕组、起动绕组的始末端两根进线
D.
起动时将电机的转子反向拨动一下
【单选题】Where is our new boss at the moment?
A.
Please read the letter.
B.
No, I am sorry.
C.
He comes from Shanghai.
D.
In his office.
【简答题】We haven’t discussed yet we are going to place our new furniture A. that B .which C what D where
【单选题】We haven’t dicussed yet _______ we are going to place our new furniture.
A.
that
B.
which
C.
what
D.
where
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