单项选择题

下列不可用于C语言用户标识符的是（）

A.j2_KEY
B.char
C._g_
D.Double

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单项选择题

设变量a是int型，f是float型，i是double型，则表达式10+′a′+i*f值的数据类型为（）

A.int
B.float
C.double
D.不确定

单项选择题

A．No sufficient security has been provided to the witnesses and lawyers.
B．Not every defendant has been offered an attorney.
C．Some lawyers have threatened to boycott the trial.
D．Saddam Hussein refuses to turn up at the new phase of the trial.

A.No
B.
B．Not
C.
C．Some
D.
D．Saddam
E.