问题
单项选择题 A1型题
光化学烟雾对眼睛产生强烈刺激作用的物质主要是（）
A.N0x和O3
B.PAN和醛类
C.SO2和O3
D.NO2和各种自由基
E.醛类和NOx
答案
参考答案：B
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光化学烟雾对眼睛产生强烈刺激作用的物质主要是（）
A.N0x和O3
B.PAN和醛类
C.SO2和O3
D.NO2和各种自由基
E.醛类和NOx
参考答案：B
| 补全对话（有两项多余选项）。 | |
| A: When was the telephone invented, do you know? B: Yes, 1 A: 2 B:No,I think it was invented after the car. A: 3 B: It’s used for talking with our friends and relatives. A: 4 B:'I think the car is more useful than the telephone. It can take us everywhere we want to go. A: Would you like to buy a car some day? B: 5 | |
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| 1. 2. 3. 4. 5. |