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【单选题】
若长半径为No,短半径为Ne,则光性是()。A.
负光性
B.
正光性
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【单选题】Passage Four(36~40) One of Britain’s bravest women told yesterday how she helped to catch suspected (可疑的) police killer David Bieber—and was thanked with flowers by the police. It was also said that s...
A.
get
B.
be paid
C.
ask for
D.
own
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