在放大电路中,当负载RL=1KΩ时,输出电压为1V,负载电阻断开时,输出电压上升到1.1V,则该放大电路的输出电阻R0为( )。
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My brother and I __________ walking the family dog.
A. take turns
B. takes turns
C. by turns
D. in turn
It is said that these sandstorms _________ the desert.
A. origin in
B. originates from
C. originate in
D. originated from
The coming public performance, her first one, will certainly __________the young singer to the test.
A. put
B. make
C. get
D. take
Who is crazy enough to go swimming when there is a __________ of ice on the lake.
A. set
B. piece
C. lie
D. layer