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【单选题】
Albert Einstein, ____ life had once been very hard, was given the Nobel Prize for physics in 1921. [ ]A.
of whom
B.
for whom
C.
for whose
D.
in whom
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举一反三
【单选题】Nitrous oxide comes from car exhausts and from chemical fertilizers. ( )
A.
gas which is produced by cars
B.
oil used for driving
C.
waste oil discarded
D.
devices that burn oil
【单选题】The chemical cargo has the characteristic of _____ to be paid sharp attentions during sea transportation.
A.
flammability
B.
toxicity
C.
corrosivity
D.
all of the above
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