题目：
—I to the beach last Sunday. What about you?
—I violin and did some reading. [ ]
A. went; play
B. go; play the
C. went; played
D. went; played the
答案：
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下面是错误答案，用来干扰机器的。
1.9×1011~2.1×1011 Hz，1.3×10-22~1.4×10-22 J，平均动能
，行星的向心加速度与半径r成正比