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问题 选择题

下列化学实验操作中，正确的是[ ]

A．熄灭酒精灯时，用嘴吹灭

B．点燃氢气前，检验氢气纯度

C．稀释浓硫酸时，把水倒入浓硫酸中

D．将实验时多取的药品放回原试剂瓶中

答案

答案：D

补全对话，情景问答
根据对话内容，从方框中选择适当的选项补全对话。选项中有两项为多余的选项。

A. Oh, it was great.
B. Oh, that's all right.
C. We've been to many wonderful places.
D. How do you like Yinchuan?
E. How did you go there?
F. But I think sand sliding is the most exciting one.
G. I think Sand Lake is the best.

A: Hi, Alice! How was your last summer holiday?
B: 1            .
A: Where did you go?
B: I went to Yinchuan with my parents.
A: 2            . 
B: It's one of the most beautiful cities in the northwest of China. I like it very much.
A: How long did you stay there?
B: We stay there for five days. 3           . 
A: Which is your favorite place?
B: 4           .When I was there, I lost myself in the beautiful scenery.
A: What interesting thing did you do there?
B: Lots of things, such as swimming, boating, fishing and riding camels. 5           . 
A: Oh, really, I can't wait to go there.
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湿地
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