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【单选题】
According to the first paragraph, what happened to the waters off southern Greenland and Iceland in the last 30 years?A.
The waters are salty.
B.
The waters are not very salty.
C.
The salinity is decreasing.
D.
The sea water is becoming less and less.
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【简答题】润湿滞后
【简答题】润湿滞后(wetting hysteresis)
【单选题】In all，6 000 companies are __________ in producing the parts that are needed for these aircraft．
A.
eoncemed
B.
recommended．
C.
involved
D.
offended
【简答题】动润湿滞后
【单选题】All is needed is a supply of oil.A．the thingB．thatC．whatD．which
A.
All ____is needed is a supply of oil. A．the thing
B.
that
C.
what
D.
which
【单选题】Construction is expanding all over China, no doubt many materials will be needed at a very big amount in future.
A.
China, no doubt many materials will be needed for a very big amount
B.
China, no doubt many materials will be needed in a very big amount
C.
China no doubt many materials will be needed in large amounts
D.
China no doubt many materials will be needed for large amounts
【简答题】润湿滞后
【单选题】All __________is a continuous supply of the basic necessities of life．A.which is needed###
A.
All __________is a continuous supply of the basic necessities of life． A.which is needed
B.
the thing needed
C.
for our needs
D.
that is needed
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