The ____________ station is nearing completion.
A. hydro electric
B. hydroelectric
C. hydro-electric
D. hydroelectrical
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The ruling party was facing an identity ________ .
A. crises
B. crisis
C. crisisis
D. crisises
We provide help to families _____________ situations.
A. about crisis
B. of crisis
C. on crisis
D. in crisis
集成运放的线性区存在( )现象。
A. 虚短
B. 虚断
C. 虚断和虚短
D. 失真
为增大电压放大倍数,集成运放的中间级大多采用( )。
A. 差动放大电路
B. 共射放大电路
C. 共集放大电路