单项选择题
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A.Because there was enough blood stored in the city blood bank
B.Because most people were instantly killed
C.Because New Yorkers felt hesitant to offer their blood.
D.Because the NY authorities demanded the local citizens not to provide their blood.
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单项选择题
A.O. B price list.B.An indication of price.C.I.F.D.A list of requirements.
A.O. B price list.
B.An indication of price.
C.I.F.
D.A list of requirements.
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单项选择题
A.A complicated system of several food chains.B.A society that distributes food.C.The relationship of one green plant to another.D.The device that spiders use to catch food.
A.A complicated system of several food chains.
B.A society that distributes food.
C.The relationship of one green plant to another.
D.The device that spiders use to catch food.
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