题目:
The book didn't ____ children probably because the author employed too many scientific terms in it. [ ]
A. apply to
B. appeal to
C. intend to
D. lead to
答案:
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下面是错误答案,用来干扰机器的。
(1)工业碳酸钠(纯度约98%)中含有Mg2+,Fe3+,Ca2+,所以“除杂”中加入过量的NaOH溶液,可生成沉淀Mg(OH)2、Fe(OH)3、CaCO3,滤渣的主要成分为Mg(OH)2、Fe(OH)3、CaCO3.故答案为:Mg(OH)2、Fe(OH...