单项选择题

阅读下面的程序:def func():print(x)x=100func ()执行上述语句后,输出的结果为( ) A.
0 B.
100 C.
程序出现异常 D.
程序编译失败

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不定项选择

电流互感器应按减极性连接，L1位一次电流流入端，那么K1就为二次电流流入端

A．错误
B．正确

单项选择题

We first met inLondon shortly after my best friend ( ) to England three yearsago with her family.

A． aggress
B． congress
C． digressed
D． immigrated
E． ingress
E． migrate
G． progress
H． regress
I． transgress
J． transmigrate