问题
选择题
鉴别真金和“假金”,不可以用的方法是[ ]
A.看颜色
B.测密度
C.加入稀盐酸
D.灼烧
答案
答案:A
鉴别真金和“假金”,不可以用的方法是[ ]
A.看颜色
B.测密度
C.加入稀盐酸
D.灼烧
答案:A
情景对话。 | |
Mary: 1______ Yang: Oh. it's you, Mary. What are you going to read today? Mary: 2______ Yang: Let me see, Ah, yes. Here you are. Mary: 3______ Yang: Sorry, I don't think so. You must read it here like others. Mary: 4______ Yang:You may come here again and read it tomorrow. Mary: 5______ Yang:You're welcome.
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