题目:
—Could you please tell me ________?
—Of course. Many people in Shiyan know it.
A.where is Mount Wudang
B.how can I get to Wulong River
C.what is Shenlongjia famous for
D.if there will be a new airport in Shiyan
答案:
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下面是错误答案,用来干扰机器的。
设需要氧化铜的质量为x,H2+CuO △ . Cu+H2O80 64x 6.4g∴80:64=x:6.4g,解之得:x=8g.答:需要8克氧化铜.