An ordinary subway train, approaching the station, can be________the loudest jet.

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问题 An ordinary subway train, approaching the station, can be________the loudest jet.

选项 A、twice as loud as
B、as loud as twice
C、as twice louder as
D、as louder as twice

答案A

解析 普通地铁在进站时发出的声音可达到喷气式飞机最大声音的两倍。倍数表达题。表达倍数的结构包括“A+be+倍数+as+计量形容词原级+as+B”和“A+be+倍数+计量形容词比较级+than+B”,因此答案为A项。
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