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If twice as many $1 bulbs as $2 bulbs were ordered.这半句话帮我分析一

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If twice as many $1 bulbs as $2 bulbs were ordered.这半句话帮我分析一下
主语怎么看,哪个是哪个的两倍,好搞额.一般不都是XX is as many/high...adj./as XXX.像上面这句怎么看稍微详细一点点谢谢~
是SAT一道数学题中的.
If twice as many $1 bulbs as $2 bulbs were ordered.这半句话帮我分析一
这句话应该这么看,as .as.和什么一样,那么肯定是后面的2美元的灯泡数量比较.
就是说
如果订购1块钱的灯泡的数量是2块钱灯泡数量的2倍.
我们一般用 as ..much as
这里much 用many 1 bulbs 代替了.
所以用much 替换下可以更加清晰些.