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【单选题】
大体积混凝土施工时，常采用的外加剂是（）。A.
减水剂
B.
引气剂
C.
缓凝剂
D.
早强剂
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【单选题】—We can use WeChat to talk with each other on the Internet. —Really? Will you show me ________ it?
A.
how to use
B.
what to use
C.
how can I use
D.
what can I use
【单选题】We consider______the instrument be adjusted each time it is used.
A.
that it necessary
B.
it necessary that
C.
necessary that
D.
necessary of it that
【单选题】We each ( ) WeChat nowadays, even the old people.
A.
play
B.
plays
C.
playing
D.
played
【简答题】利用两种电源模型的等效变换，求下图所示电路中2Ω电阻的电流I 08． 利用两种电源模型的等效变换，求下图所示电路中2Ω电阻的电流I 0
【单选题】—We can use Wechat（微信） to talk with each other online. —Really? Could you please show me how ______it?
A.
doing
B.
to do
C.
do
D.
does
【单选题】We can conclude from Paragraph 2 that______.
A.
both WeChat and WhatsApp are chatting tools
B.
WhatsApp has more functions compared with WeChat
C.
customers can shop online through most chatting softwares
D.
Xiaomi is so popular that 150,000 phones are sold every ten minutes
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