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【单选题】
遗传漂变指的是A.
基因频率的增加
B.
基因频率的降低
C.
基因由A变为a大于由a变为A
D.
基因频率在小群体中的随机增减
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【单选题】— Excuse me, where can I park my car? — Drive ahead, and you will see the sign_____ on your right.
A.
B.
【单选题】—Can I park my car here? —Sorry ! You do it. No parking is allowed here. [ ]
A.
may not
B.
don't
C.
won't
D.
mustn't
【单选题】听力原文：M: Excuse me, can I park my car here? W: If you do that, you'll block my way. What does the woman mean?
A.
She agrees the man to park his car here.
B.
She wants to park her car here.
C.
She doesn't allow the man to park his car here.
【单选题】— Can I park my car here? — No, you _______. Parking is not allowed here. [ ]
A.
can
B.
mustn't
C.
needn't
D.
may not
【单选题】---Can I park my car here? ---Yes. You can park on ______ side of this road.
A.
either
B.
neither
C.
both
D.
all
【单选题】—Can I park my car here? —Yes, you can park on _____ side of the street. [ ]
A.
either
B.
neither
C.
both
D.
all
【单选题】– Excuse me, can I park my car here? - Yes, you can park on ＿＿＿＿＿＿ side of the street.
A.
another
B.
both
C.
either
D.
neither
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