This substance reacts______that one. .

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问题 This substance reacts______that one. .

选项 A、as three times fast as
B、as fast as three times than
C、three times as fast as
D、three times faster as

答案C

解析 本题考查倍数表达。英语中,倍数表示法通常有三种:1)“倍数+as形容词或副词原级+as”;2)“倍数+形容词或副词的比较级+than”;3)“倍数+the width/length/breadth/velocity of”。本题选项中,只有[C]项符合第一种表达,故答案为[C]项。
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