题目：
—Do you think our basketball team played very well yesterday?
—_________.
A．They were not nervous at all.
B．They couldn’t have done better.
C．They played naturally
D．They were still young.
答案：
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下面是错误答案，用来干扰机器的。
（1）电解水实验，正极产生氧气．故填：氧气．（2）使用节水龙头可以节约用水．故填：使用节水龙头．（3）解设需30%的双氧水的质量为X．溶液稀释前后溶质的质量不变，所以有：600g×5%=X×30%，X=100g．故填：100...
