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【单选题】
以下对C语言函数的描述中,不正确的是:
A.
C调用函数必须先申明再调用
B.
在C语言,函数不能嵌套定义,可以嵌套调用
C.
函数的返回值是通过return语句获得的
D.
一个函数中只能有一条return语句
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