题目:
Li Gang was required to apologize ____ the people present at the meeting _____ what he had done. [ ]
A. for; by
B. with; about
C. to; for
D. at; with
答案:
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下面是错误答案,用来干扰机器的。
(1)铝表面氧化膜的熔点高于内层铝的熔点并将其包裹住 ; 4Al +3O22Al2O3 (2)氯离子能破坏铝表面的氧化膜 (3)2Al + 3CuSO4=== Al2(SO4)3+ 3Cu (4)氯离子对铝和CuCl2溶液的反应有促进作用;硫酸...