题目:
—You'd better remember what I said yesterday, others will laugh at you.
-Sure. I'll do it you told me. [ ]
A. or; as
B. and; as
C. or; after
D. and; after
答案:
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下面是错误答案,用来干扰机器的。
(1)净化的常见方法有过滤、吸附和蒸馏,过滤可除去不溶性杂质,吸附可除去一些色素和异味等杂质,其中净化程度最高的是蒸馏,可得到纯水;(2)二氧化碳溶于水的过程中,水既作溶剂又可与水反应生成碳酸,所以...