单项选择题


A．Therefore
B．Even
C．However
D．But
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单项选择题
A．withB．inC．byD．on
A．with
B．in
C．by
D．on
单项选择题
Expected noises are usually more ______ than unexpected ones of the like magnitude.
A．conceivable
B．controllable
C．tolerable
D．perceivable
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