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【判断题】
低压断路器又称自动空气开关。
A.
正确
B.
错误
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举一反三
【单选题】神经细胞动作电位的去极相中,通透性最大的离子是
A.
K+
B.
Na+
C.
Cl-
D.
Ca2+
【单选题】It was with great delight that I read in your February _____ the letter to the Editor written by Prof. Johnson.
A.
issue
B.
printing
C.
magazine
D.
copy
【单选题】Which of the following statements can be inferred from the passage?
A.
Despite the great prospect some scientists hold, artificial intelligence has achieved a modest Success.
B.
With its commercial application in medical diagnosis, artificial intelligence has made a greatest breakthrough.
C.
Artificial intelligence has found a wide application in almost every field of society.
D.
It is too ideal to be true to make a machine think like human beings.
【单选题】符合模数数列规定的尺寸为
A.
构造尺寸
B.
标志尺寸
C.
实际尺寸
D.
允许偏差值
【单选题】神经细胞动作电位的去极相中,通透性最大的离子是
A.
K+
B.
Na+
C.
Cl-
D.
Ca2+
E.
Mg2+
【单选题】It was with great delight that I read in your February _____ the letter to the Editor written by Prof. Johnson.
A.
issue
B.
item
C.
magazine
D.
copy
【判断题】随着主偏角的增大,散热条件变好,切削温度下降。
A.
正确
B.
错误
【多选题】异步串行数据通信有如下哪几种数据通路形式。
A.
单工
B.
双工
C.
半双工
D.
全双工
【单选题】晶体三极管是由两个PN结构成的一种半导体器件,这两个PN结分别称为( )。
A.
基结 集电结
B.
集电结 发射结
C.
基结 发射结
D.
PNP结 NPN结
【简答题】串行通信有哪几种数据通路形式?
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