听力原文:M: You'd better take your coat with you. It looks like it's going to snow. W: You may be right. Thank you for mentioning this. How is the weather now?
A.
It's snowing.
B.
It's raining.
C.
It's cloudy.
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参考答案:
举一反三
【单选题】已知有以下程序 class Point{ private: float x,y ; // 点的坐标 public: Point(float h,float v); }; class Line { private: Point p1,p2; ...... }; 则哪些 Line 类的构造函数定义是正确的( )