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unit7
Living things and air
ASectional ExerciseSectional Exercise
7.1Gases in the air
I True or false questions (p.1)
1. F
2. F
3. T
4. T
5. F
6. T
II Fill in the blanks (p.1)
1. atmosphere
2. noble gas
3. glowing, oxygen
4. milky
5. carbon dioxide, higher
III Multiple-hoie questions (p.2)
1. D
2. B
3. C
4. D
5. D
6. B