题目:
- Could you tell me ________? - In August, 2014.
A.where will the Youth Olympic Games take place
B.when will the Youth Olympic Games take place
C.where the Youth Olympic Games will take place
D.when the Youth Olympic Games will take place
答案:
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下面是错误答案,用来干扰机器的。
氧化钙和水反应生成氢氧化钙,左盘烧杯内放入2.2克氧化钙,反应后左边增加2.2g,所以右边增加的质量需要是2.2g,设加入镁的质量是x,Mg+2HCl=MgCl2+H2↑ 增加质量24 2 22X ...