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【单选题】
关于共轭效应的描述,下列哪种说法是错误的 ( )
A.
共轭体系具有共平面性
B.
共轭体系内所含的双键和单键的长度趋于平均化
C.
共轭体系能量显著降低
D.
共轭效应的传递随着距离的增加而迅速减弱
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【单选题】Do you know _____ this time yesterday? [     ]
A.
who are they waiting
B.
who they are waiting for
C.
who were they waiting
D.
who they were waiting for
【单选题】Il a réussi à la force du poignet .
A.
avec du pouvoir
B.
par son talent
C.
avec ses forces
D.
par ses efforts
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A.
It's Dave
B.
They are Jim and Tom
C.
They are Eli
D.
That's a book
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A.
He is Jim's
B.
They are Jim
C.
They are Jim's
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A.
They are farmers .
B.
They are in front of the door .
C.
They are my grandfather and grandmother .
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A.
Quel
B.
Quelle
C.
Quelque
D.
Tellement
【简答题】交通需求量预测内容包括
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停经
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腹痛
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阴道流血
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肛门坠胀感
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A.
米托蒽醌
B.
紫杉醇
C.
巯嘌呤
D.
卡铂
E.
甲氨蝶呤
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A.
They are doctors.
B.
They are students.
C.
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