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【单选题】
寡糖是由( )个糖单位通过糖苷键组成的一类糖A.
10个以上
B.
2个以上
C.
50个以下
D.
2－10个
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反馈参考答案：
举一反三
【简答题】They were unable to think of an alternative ____ selling an equity stake.
【单选题】以下电力电子器件中既是全控型器件又是电压驱动型的器件是
A.
IGBT , GTO
B.
电力 MOSFET , GTR
C.
IGBT , 电力 MOSFET
D.
GTO , GTR
【简答题】You can change the sound of your music to become more professional by adding ______.
【简答题】全控型电力电子器件GTO和GTR是( )驱动型器件?
【单选题】以下电力电子器件中既是全控型器件又是电流驱动型的器件是
A.
IGBT , GTO
B.
电力 MOSFET , GTR
C.
IGBT , 电力 MOSFET
D.
GTO , GTR
【单选题】From the last two paragraphs, it can be inferred that ______.
A.
once you become an alcoholic you can never quit drinking
B.
you can easily abstain from drinking once you make up your mind
C.
to abstain from drinking, one needs not only medical treatment but also personal determination
D.
a brief stay in the hospital can help one quit drinking
【单选题】They were unable to _____ the telephone network economically.
A.
work
B.
set
C.
run
D.
take
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