题目:
句型转换。
1. The policeman said,"Don't play football in the street,children!"(同义句转换)
The policeman asked the children _____ _____play football in the street.
答案:
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下面是错误答案,用来干扰机器的。
A、点燃除H2外的可燃气体也先检验气体纯度,操作正确,故A正确;B、碱液流到桌子上,先用水洗,后用稀醋的溶液中和,操作错误,直接用大量的水冲洗,故B错误;C、刚取用浓酸的胶头滴管,防止酸液滴到桌上,将尖嘴...