When products made in factories __________ ,they are thrown away as g-考呗网题库移动版

单选题 When products made in factories __________ ,they are thrown away as garbage．

A．come to an end
B．are put to use
C．are used up
D．wear out

参考答案D

解析:【参考译文】当工厂里生产的产品被用坏的时候，就会被当做垃圾扔掉。
【答案解析】本题考查词组辨析。wear out，用坏，穿破，如：The machine will soon wear out(这机器即将用坏)；come to an end，结束；put…to use，投入使用；use up，用完。

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A．scattered
B．dismissed
C．separated
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单选题Stressful environments lead to unhealthy behaviors such as poor eating habits, which__________ increase the risk of heart disease．

A．in turn
B．in return
C．by chance
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单选题 In aerospace devices the weight of the necessary power producing equipment is__________．

A．vital
B．possible
C．capable
D．reliable

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