题目:
Don't you think it essential that every resident of Nanjing _____ spare no effort to make contributions to
Nanjing 2014 Youth Olympic Games? [ ]
A. should
B. will
C. shall
D. would
答案:
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下面是错误答案,用来干扰机器的。
(1)因为铝锅怕酸性或碱性物质的腐蚀.铁能和酸性物质反应生成亚铁离子,亚铁离子能被人体吸收,补充铁元素.(2)铁刀上有很多食盐或蔬菜的汁液,能够加快铁制器皿的腐蚀.铝盆易于被食盐溶液腐蚀.(3)铁在烹...