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【判断题】
积分环节相频特性 。 ( )A.
正确
B.
错误
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【单选题】The passage indicates that, for Mason, political activities were ______. ( )
A.
undertaken only when absolutely necessary
B.
a fundamental and life long preoccupation
C.
something he successfully avoided throughout his life
D.
something to which he always wished to devote more time and attention
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