题目内容
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The kind of air pollution that is most harmful to health is caused by ______.
A．lead emissions
B．carbon-dioxide emissions
C．sulphur dioxide emissions
D．small particles
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更多“The kind of air pollution that is most harmful to health is caused by ______.A．lead emissi”相关的问题
A．They're cheaper and simpler to drive.
B．They are faster.
C．They cause littler air pollution.
D．They have a brighter future.
Which of the following can best served as the title of the passage？
A．The Cause of Air Pollution.
B．The Issue of Air Pollution.
C．The Types of Air Pollution.
D．The Prevention of Air Pollution.
A．These products are cheaper and more persuasive.
B．They are abiding by a kind of new contract.
C．The manufacturer of the products urges them to buy.
D．Buying such products has become a vogue.
A. The high value
B. Low density or weight
C. A and B
D. To add cost
Environmental engineers' work is to
A．design new kind of cars, buses and trucks that will not pollute the air
B．protect the environment
C．produce cars that will not pollute the air
A、laundry service
B、free shuttle bus
C、free taxi service
D、free booking air ticket
Air pollution is the most serious kind of pollution because ______.
A．it's bad for all living things in the world
B．it makes much noise
C．it makes our rivers and lakes dirty
D．it makes us angry more easily
A、wonder
B、stay
C、roam
D、play
A. The high value
B. Low density or weight
C. A and B
D. Shortest time to transport
The underlined word "smog" (in Paragraph 2) mean"______ ".
A．a kind of brown smoke
B．the main chemical in ozone
C．smoke caused by air pollution
D．brown unhealthy air caused by smoke from cars or factories and fog
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