2. 外语
  3. This substance reacts______that one.

This substance reacts______that one.

admin2010-05-03  13
问题 This substance reacts______that one.
选项 A、three times as fast as
B、as three times fast as
C、as fast as three times
D、three times as fast as
答案A
解析 倍数表示法通常有三种：1)X times + as形容词或副词原级+as如：This substance reacts three times as fast as that one. 这种物质的反应速度是那种物质的三倍。2)X times+形容词或副词的比较级+than如：The car runs twenty percent faster than the motor. 小汽车比摩托车快20％。3)X times + the width(length，breadth，level，value，velocity) of如：The lake is twice the width of that river. 这个湖的宽度是那个湖的2倍。本题答案符合第一种表达法。
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