单项选择题

Other spots are characterized by their ability to modify or ______ sound, even to the point of audio saturation.

A．intensify
B．amplify
C．enlarge
D．reinforce
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单项选择题
The planned deregulation has ______ concern 1;hat Peter will face stiffer competition and an erosion of its 42 percent market share.
A．multiplied
B．bred
C．magnified
D．generated
单项选择题
It could do considerable damage if it happened to hit some of the more ______ vessels.
A．elastic
B．vulnerable
C．fragile
D．flexible
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