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【单选题】
NPN型三极管构成的共射极放大电路,输出波形顶部出现失真,是( )。A.
截止失真
B.
饱和失真
C.
大信号失真
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举一反三
【单选题】Which of the following consists of three words that refer exactly to the same thing in the passage?
A.
climate, temperature, heat
B.
carbon dioxide, the gas, atmosphere
C.
output, production, effect
D.
termites, critters, insects
【单选题】24小时内输入右旋糖酐2000 ml ,病人伤口出血加重,其最可能原因是
A.
血小板被稀释
B.
凝血因子缺乏
C.
DIC
D.
血小板和血管壁被右旋糖酐覆盖
E.
血液被稀释，凝血因子和血小板均被稀释而减少
【单选题】----What’s that thing with three legs? ---- it’s a cup. It _____ for drinking in the old days.
A.
uses
B.
used
C.
is used
D.
was used
【简答题】汉代出现的《周髀算经》(成书年代大约是公元前1世纪)是现存我国最古老的数学著作。汉代出现的另一本著作 ______ 标着我国古代数学体系的初步形成。
【单选题】-What's that thing with three legs? -It's cup. It ____ for drinking in the old days.
A.
uses
B.
used
C.
is used
D.
was used
【单选题】Which of the following consists of three words that refer exactly to the same thing in the passage?
A.
Climate, temperature, heat.
B.
Carbon dioxide, the gas, atmosphere.
C.
Output, production, effect.
D.
Termites, critters, insects.
【单选题】休克病人,在补液时,下列哪项错误( )
A.
一般在头30～60分钟内快速输入500～1000ml
B.
头12小时内补入1500～2000ml
C.
头24小时内补人液体总量2500～4000ml
D.
头24小时内输入低分子右旋糖酐量不宜超过1000rnl
E.
在快速大量补液过程中，不需观察脉搏、血压、尿量等指标。
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