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【单选题】
暗黑色的瓶装奶是为了防止何种维生素后破坏( )A.
维生素A
B.
维生素C
C.
维生素D
D.
维生素B2
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举一反三
【单选题】Why does the professor mention the wood thrush?
A.
To contrast its displacement activities with those of other animal species
B.
To explain that some animals display displacement activities other than grooming
C.
To point out how displacement activities are influenced by the environment
D.
To give an example of an animal that does not display displacement activities
【单选题】听力原文：W: Does the Motor Voter Law cover all the states? M: No. W: Which ones? Why not? M: Six states are not covered by the provisions of the National Voter Registration Act. They are: North Dakota (be...
A.
North Dakota and Washington D.C
B.
South Dakota and Washington D.C
C.
Wisconsin and Wyoming.
D.
Wyoming and Washington.
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