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【多选题】
下列关于保护环说法正确的是（）A.
保护环的目的是给衬底或井提供均匀的偏置电压。
B.
保护环可以接在VDD或GND上。
C.
保护环可以减少衬底耦合噪声对敏感电路的影响。
D.
保护环无助于Latchup效应的避免。
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举一反三
【单选题】-- If only I _______ the teachers instructions, in which case I ______ not so unlucky now. -- It’s high time that you _______ yourself.
A.
followed; am; should reflect
B.
had followed; would have been; reflected
C.
would follow; would be; reflect
D.
had followed; would be; reflected
【简答题】Why the foreign teacher succeeded in getting PAID was due to the situation in which the number of foreign teachers ______of so many desperate schools.
【单选题】Only when I left my hometown ________ how precious it is to me. [ ]
A.
did I realize
B.
I realized
C.
had I realized
D.
I had realized
【单选题】It's very cold outside. You______ put on your overcoat.
A.
had better to
B.
would better to
C.
had better
D.
would better
【简答题】地貌旅游资源可以分为哪五大类?
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