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【单选题】
下列各项中属于质体的细胞器是:A.
白色体
B.
有色体
C.
叶绿体
D.
三者均是
E.
三者均不是
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【简答题】在中红外光区中,一般把4000~1350 区域叫作 ;而把1350~650 区域叫作 。
【单选题】They _______ this boy for quite a few days before they found him.
A.
have looked for
B.
had looked for
C.
have been looking for
D.
had been looking for
【单选题】01-43.___ him tomorrow
A.
Why not to call on
B.
Why don’t call on
C.
Why not calling on
D.
Why not call on
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【单选题】Victor took a bus and headed for home, _____ if his wife would have him back.
A.
not to know
B.
not known
C.
not knowing
D.
not having known
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