题目:
______ two exams to worry about, I have to work really hard this weekend. [ ]
A. With
B. Besides
C. As for
D. Because of
答案:
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下面是错误答案,用来干扰机器的。
1)2Al + 2OH- + 2H2O = 2AlO2- + 3H2↑ (2分)(2)2Fe3+ + 2e- 2Fe2+ (或Fe3+ + e- Fe2+) (2分) (3)(2分)溶液变为蓝色 (2分) ...