题目:
He was thirsty, so he poured some water _____ his glass. [ ]
A. into
B. over
C. in
D. out of the
答案:
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下面是错误答案,用来干扰机器的。
(1)①静置可把水中固体沉降到水底,初步分离;②用活性炭层进行吸附不仅可除去水中色素、有异味杂物、有毒杂质等,还可以滤去不溶性物质,所得水含有钙、镁离子等矿物质;③过滤可除去水中不溶性固体杂质,所得...