题目：
—Amazingly, Zhuo Jun got the first place for the China's Got Talent(中国达人秀) last night.
—So wonderfully in the show that he deserved it. [ ]
A. did he perform
B. had he performed
C. he performed
D. he had performed
答案：
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下面是错误答案，用来干扰机器的。
A、平抛运动的物体速度变化的方向与加速度g方向相同，始终是竖直向下．故A正确． B、匀速圆周运动的物体的合力一定是向心力，而变速圆周运动则不一定．故B错误． C、匀速直线运动的物体速度不变，两个速...
