题目内容

下列哪个叙述是正确的？

A. 源文件可以有2条包语句(package)。
B. 源文件不可以有多条import语句。
C. 如果源文件有package语句，该语句也可以是源文件的第2条语句。
D. 类中的类方法(static方法)只能操作类变量(static变量)，不可以操作实例变量。

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