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【单选题】
下列关于光敏二极管和光敏三极管的对比不正确的是( )A.
光敏二极管的光电流很小，光敏三极管的光电流则较大
B.
光敏二极管与光敏三极管的暗点流相差不大
C.
工作频率较，用光敏二极管；工作频率较低时，用光敏三极管
D.
光敏二极管的线性特性较差，而光敏三极管有很好的线性特性
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【单选题】拔除“T”形引流管的指征中错误的是
A.
T管造影未见缺损
B.
注射造影剂时无阻力
C.
引流一周,引流液透明金黄色
D.
造影剂迅速流入十二指肠
E.
抬高引流袋,T管引流量减少
【单选题】Sports and games make our bodies strong, prevent us from getting too fat, and keep us healthy. But these are not their only use. They give us valuable practice in making eyes, brain and muscles work t...
A.
use, first, our eyes, then the brain and finally the muscles
B.
make our eyes, brain and muscles work almost at the same time
C.
use mainly the arms and legs to hit
D.
use mainly the muscles so that the ball is met and hit back
【单选题】Sports and games make our bodies strong, prevent us from getting too fat, and keep us healthy. But there are not their only use. They give us valuable practice in making eyes, brain and muscles work t...
A.
use, first, our eyes, then the brain and finally the muscles
B.
make our eyes, brain and muscles work almost at the same time
C.
use mainly the arms and legs to hit the ball
D.
use mainly the muscles so that the ball is met and hit back
【简答题】In America, the best-known (11) to be on December thirty-first is Times Square in New York City. Hundreds of thousands of people gather in the cold. They (12) together and wait for midnight. It feels ...
【单选题】胆总管探查术后所置的T形引流管拔除指征中,下列哪项错误(0分)
A.
术后一周
B.
血胆红素正常
C.
病人体温正常
D.
病人无腹痛、腹胀等症状
E.
T管造影示肝内外胆管显影正常
【单选题】胆总管探查术后所置的T形引流管拔除指征中，下列哪项错误（）
A.
术后一周
B.
血胆红素正常
C.
病人体温正常
D.
病人无腹痛、腹胀等症状
E.
T管造影示肝内外胆管显影正常
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