单项选择题

Who benefited the least from fridges according to the author

A．Inventors
B．Consumers
C．Manufacturers
D．Travelling salesmen
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单项选择题
Which of the following phrases in the fifth paragraph indicates the fridge's negative effect on the environment
A．"Hum continuously"
B．"Climatically almost unnecessary"
C．"Artificially-cooled space"
D．"With mild temperatures"
单项选择题
It is surprising that Americans who worship variety and individuality______.
A．still judge a man by his clothes
B．hold the uniform in such high regard
C．enjoy having a professional identity
D．will respect an elevator operator as much as a general in uniform
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