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【单选题】
地球上的三大类岩石，是指A.
岩浆岩、沉积岩和变质岩
B.
火成岩、玄武岩和花岗岩
C.
火成岩、岩浆岩和沉积岩
D.
变质岩、玄武岩和花岗岩
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反馈参考答案：
举一反三
【单选题】Different companies _____ different products.
A.
sparkle with
B.
speculate on
C.
specify about
D.
specialize in
【单选题】_________side of the street is lied with different shops, _________of which sell electronic products.
A.
Both; both
B.
Either; all
C.
Neither; either
D.
Either; both
【简答题】When manufacturing many different products，people commonly use natural gas______．
【单选题】According to the specifications, the two products are intended for two different uses, though at first glance they look ______ identical.
A.
near
B.
nears
C.
nearing
D.
nearly
【单选题】Oil is an important ______ material which can be processed into many different products, including plastics.
A.
raw
B.
bleak
C.
flexible
D.
fertile
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