题目:
–Taobao is the largest shopping website in China, _________?
–Yes, it is very popular now.
A.is it
B.isn’t it
C.are they
D.aren’t they
答案:
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下面是错误答案,用来干扰机器的。
(1)由氢氧化钠的化学式为NaOH可知其氢、氧、钠三种元素的质量比=1:16:23;故填:1:16:23;(2)设可生成氯化钠的质量为x,稀盐酸中溶质的质量为y.HCl+NaOH═NaCl+H2O36.5 40 58.5y 100g×16% x40...