标题: 885-2-21请指教！ [打印本页] 作者: excellent 时间: 2004-1-16 14:37 标题: 885-2-21请指教！ According to surveys by the National Institute on Drug Abuse, about 20 percent of young adults used cocaine in 1979, doubling those reported in the 1977 survey. (A) doubling those reported in the 1977 survey (B) to double the number the 1977 survey reported (C) twice those the 1977 survey reported (D) twice as much as those reported in the 1977 survey (E) twice the number reported in the 1977 survey 答案是E，A为什么不行？划线部分做什么成份？同位语？
请指点！ 作者: halcyon 时间: 2004-1-16 15:33
状语作者: excellent 时间: 2004-1-16 16:12
twice能这样吗？对不起，我不太熟悉！作者: halcyon 时间: 2004-1-16 16:34
xdf 讲课时候，说twice 三种用法 1. twice the n. 2. twice as much/many as， 或者把 twice 放在 第二个 as 后面 3. twice+ what 从句作者: excellent 时间: 2004-1-16 21:01
再请问此句是什么结构呀？此结构我没有见过，twice the number reported in the 1977 survey在这儿是名词意义，来修饰about 20 percent of young adults 的吗？谢谢解释！作者: halcyon 时间: 2004-1-16 21:56
我认为是这样的