题目:
__________of last term we ___________ over two thousand new words.[ ]
A. At the end; had learned
B. In the end; learned
C. By the end; have learned
D. By the end; had learned
答案:
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答案:B题目分析:题目的四种金属中金属活动性顺序为Al>Fe>Cu>Ag,根据在金属活动性顺序中位于前面的金属可以把位于后面的金属从它的盐的溶液中置换出来,由题意:有一种金属的盐溶液与另外三种金属单质都能发...