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【多选题】
Listen again and find out Sarah’s complaints and the salesclerk’s replies . salesclerk:A.
I’m really sorry about that.
B.
I haven’t received my package yet.
C.
I’m sorry for the trouble.
D.
I don’t think that would help.
E.
I’m here to help you.
F.
I’m tired of calling you guys again and again.
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反馈参考答案：
举一反三
【单选题】Earthquakes happen when two plates (板块) move against ________ other. [ ]
A.
both
B.
all
C.
each
D.
every
【简答题】三端集成稳压器LM7812输出电压稳定值为 ;三端集成稳压器LM7912输出电压稳定值为 。
【单选题】There _ an apple, two bananas and some oranges on the plates.
A.
is
B.
be
C.
are
D.
was
【简答题】LM7812输出稳压 V,LM7912输出稳压 V。
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