（）可以由消费者决定什么时间看，看些什么。
A.电视广告
B.报刊广告
C.网上广告
D.路边广告
参考答案：C
(本小题满分12分)动圆C截直线3x-y=0和3x+y=0所得弦长分别为8、4，求动圆圆心C的轨迹方程．
The data shows _______ successful people have in common is ______ they have perseverance.[ ]
A. that what; that
B. that that; that
C. what that; what
D. all that; because
