Pollution caused by motor vehicles can kill more people a year than road accidents. The Wo
【C1】
A.typical
B.European
C.industrial
D.Asian
【C1】
A.typical
B.European
C.industrial
D.Asian
A、Lead.
B、Mercury.
C、Nitrogen and Phosphate
D、Trace Metal
The example of the Athenian monuments is given to show ______.
A.the growing seriousness of the pollution
B.the alarming effect of increased pollution
C.the result of the air pollution caused by acid rain
D.the worst effect of the pollution caused by acid rain
The ______ system is used to reduce the air pollution caused by the engine.
A lubricating
B emission control
C starting
D ignition
A.Fuel-efficient cars.
B.Air pollution caused by cars.
C.History of Automobile developments.
D.Electric-powered cars.
A.are causing
B.is causing
C.are caused
D.is caused
A.Y
B.N
C.NG
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
The fast______(develop)of the local economy has caused serious pollution in this county.
Air pollution, together with overpopulation, ______ many problems in big cities today.
A.are causing -
B.is causing
C.are caused
D.is caused
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