下列几种现象中，你认为一定是发生化学变化而引起的现象是[ ] _爱下问搜题

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问题选择题

下列几种现象中，你认为一定是发生化学变化而引起的现象是 [ ]

A．颜色变化

B．发光发热

C．放出气体

D．燃烧

答案

答案：D

补全对话，情景问答

阅读下面对话，从方框内7个选项中选择5个恰当的句子完成此对话，并将其序号填入题前括号内。

A. I've gone to a paper factory.
B. That would be fine.
C. That's terrible!
D. Yes, of course.
E. Good idea!
F. The river has become very dirty.
G. I've been to a paper factory.

A: Where have you been, Fang Li ? I called you, but you weren't in your office.
B: 1.
A: What did you do there?
B: I found out that the factory was pouring waste water into the river near it. 2.            Lots of fish have died.
A: 3.
B: Do you think "Greener China" can do something?
A: 4.             We can write a story about it to the TV station and the newspaper.
B: 5.               Businessmen are afraid of newspapers and TV stations.

单项选择题

瞳孔散大见于()

A．脑出血

B．吗啡中毒

C．敌敌畏中毒

D．乐果中毒

E．阿托品中毒