单项选择题

Industrial leaders are Worried lest new inventions make their plants unprofitable to operate; they therefore wish to protect themselves against possible ______.

A．depreciation
B．obsolescence
C．casualties
D．bankruptcies
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单项选择题
What he expected was ______ applause for his performance, not a polite spattering noise.
A．morose
B．prodigious
C．transient
D．spontaneous
单项选择题
The day was crisp and sharp, but suddenly a misty rain began to fall and ______ the landscape.
A．hid
B．blurred
C．relieved
D．belittled
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