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【单选题】
语句always begin #5 clk=0;#10 clk=~clk; end产生的波形是__________?A.
占空比1/3
B.
clk=1
C.
clk=0
D.
周期为10
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皮皮学刷刷变学霸
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【简答题】肾小囊囊壁为双层,壁层由__________上皮构成,脏层的细胞特殊,称为__________。
【单选题】Another mode called Mode S (Mode Select) is designed to help avoiding ______ of the transponder (having many radars in busy areas) and to allow automatic collision avoidance.
A.
over-interruption
B.
over-loading
C.
over-weight
D.
over-interrogation
【单选题】Quite a number of NBA players have the experience of______ from one team to another.
A.
transforming
B.
transferring
C.
transplanting
D.
transmitting
【单选题】There is a beautiful park Mary’s house.
A.
in the front of
B.
in the front
C.
in front of
【单选题】There is a beautiful lake in this city, ?
A.
isn’t it
B.
isn’t there
C.
is it
D.
hasn’t it
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