[单选题]In a migraine headache, the blood vessels of the head first _________ and then dilate and press against the nerves.
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2023-10-01 08:01:10
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[单选题]In a migraine headache, the blood vessels of the head first _________ and then dilate and press against the nerves.

A.contact
B.contrast
C.contract
D.connect
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