更多"Smoke particles and other air pollu"的相关试题:
[单项选择]Smoke particles and other air pollutants are often trapped in the atmosphere, thus forming dirty fog.
A. constrained
B. caught
C. concealed
D. concentrated
[单项选择]Academic records from other institutions often become part of a university's official file and can neither be returned to a student nor {{U}}duplicated{{/U}}.
A. borrowed
B. purchased
C. copied
D. rewritten
[单项选择]He and other environmentalists often went to scenic ________ to collect litter people had left.
A. vicinities
B. spots
C. locations
D. localities
[单项选择]The doctor often persuades him not to smoke more ______ is good for his health.
A. as
B. that
C. than
D. but
[单项选择]—The air is full of smoke and people are coughing.
—It will get worse ______ the government does something about the pollution.
A. but
B. unless
C. except
D. if
[单项选择]Lung cancer, like some other cancers, often doesn't produce ______ until it is too late and has spread beyond the chest to the brain, liver or bones.
A. trails
B. therapies
C. symptoms
D. symbols
[单项选择]The air inside a house on office building often has more contaminants ______ the heavily polluted air outside.
A. than does
B. as
C. as some that are
D. than that of
[单项选择]The smoke from that factory is ______ our air to a dangerous degree．
A. destroying
B. spoiling
C. polluting
D. damaging
[单项选择]Why do Americans often greet each other by asking "How did you spend your leisure time "
A. Because they are interested in the different pastime activities.
B. Because leisure time is what makes people different from each other.
C. Because they are bored with the job they have done for the whole week.
D. Because everybody does the same thing all day long.
