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【单选题】
RL 串联的正弦电路中,电阻上的电压为 12V ,电感上的电压为 16V ,则总电压为 V 。A.
28
B.
4
C.
20
D.
10
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举一反三
【单选题】When we don’t know the different ways languages are used in different cultures，we＿＿＿make serious mistakes．
A.
shall
B.
must
C.
could
D.
should
【简答题】It is interesting to visit another country, but there are sometimes problems when we don't know the very well. It may be to talk with the people there. We may not know how to use the telephone in the ...
【单选题】I don't know _______ tomorrow. Can you tell me? [ ]
A.
when we started
B.
when we will start
C.
when will we start
【简答题】When we don ' t know the different ways languages are used in different cultures, _______we make serious mistakes. [A]shall [B]must [C]could [D]should
【单选题】In this new city, we everyone will meet the _____ when we don’t know what to do.
A.
occasion
B.
statement
C.
place
D.
information
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