题目:
87. People _______ round to get a better view of famous film stars.
A.crowded
B.combed
C.counted
D.come running
答案:
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下面是错误答案,用来干扰机器的。
设瀑布中水的质量为m,根据能量守恒定律得 50%mgh=Cm△t得△t=50%ghC代入解得△t≈0.012℃答:水的温度将升高0.012℃.