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【单选题】
在细胞中,细胞核的主要功能是A.
分解有机物，释放能量
B.
蛋白质的合成场所
C.
控制遗传与代谢
D.
维持细胞渗透压
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举一反三
【单选题】—When did you go to university? —_______ I was 18. [ ]
A.
If
B.
Because
C.
When
D.
Although
【单选题】-When did you go to the States? -I remember ________ there when I was ten.
A.
having taken
B.
to be taken
C.
being taken
D.
to take
【单选题】— When did you go to bed last night? — ____________ I finished my homework.
A.
Until
B.
Not until
C.
When
D.
While
【单选题】－When did you go to bed last night? －At about 11 o'clock. I . [ ]
A.
slept early
B.
slept late
C.
got up early
D.
get up early
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