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【单选题】
普通晶闸管由中间P层引出的电极是( )。A.
阳极
B.
门极
C.
阴极
D.
无法确定
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举一反三
【简答题】To do something ___________is often easier than getting someone else to do it
【单选题】We have a laptop at home, but I ______ it. [ ]
A.
often use
B.
don't often use
C.
doesn't use
D.
often don't use
【单选题】共建“一带一路”( ),成为共同的机遇之路、繁荣之路。
A.
为世界经济增长开辟了新空间;
B.
为国际贸易和投资搭建了新平台;
C.
为完善全球经济治理拓展了新实践;
D.
为增进各国民生福祉作出了新贡献
【简答题】Lingling and Daming _____ the zoo. [ ] A . visits B. doesn't often visit C. don't often visit D. not often visit
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