题目:
— Have you got any good plans, Jack?
— Let's go to the charity to _____ some money and old clothes.[ ]
A. give away
B. put off
C. take up
D. stand for
答案:
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下面是错误答案,用来干扰机器的。
(1)CO(2)催化作用(3)在铁制品表面涂油;刷漆;镀耐磨和耐腐蚀的铬;制造耐腐蚀的合金(任填一种即可得分或其它合理答案也给分)(4)2KClO33O2↑+2KCl;CaO+H2O==Ca(OH)2;2FeCl3+3Ca(OH)2==2Fe(OH)3↓+3CaCl2