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单选题
A newly developed plastic, prized by engineers for its low weight and its durability , has been developed.
A
low cost
B
flexibility
C
long life
D
versatility
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参考解析
解析：
durability耐久力。long life长命。low cost低成本。flexibility弹性。versatility多功能。多才多艺。
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seasonB
timeC
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单选题A newly developed plastic, prized by engineers for its low weight and its durability , has been developed.A
low cost B
flexibility C
long life D
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单选题When air is at its dew point it（）.A
will contain no additional moistureB
has the lowest relative humidityC
cannot keep up its moistureD
has a low absolute humidity
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