Twice as many A as B,B是A的2倍,什么时候A是B的2倍

首先，你的汉语表达有错。看例句吧：Tom has 20 friends . I have 10 friends == Tom has twice as many friends as I do.== I have half as many friends as Tom does.貌似我前几天为你解答过。目前，就程度而言，你的英语还是蛮纠结的。需要一段时间整理。

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(1) 倍数的表达法 [说明]A is … times + adj. /adv. (比较级) + than + B.句型表示“A比B大（小、高、低等）……倍”。例如：The number of students in our school is three times larger than that in theirs.我们学校的学生数量比他们学校的多三倍。

应该是A是B的两倍，所以 第一个小孩是女孩，所以她看家里就是 4个男孩，2个女孩，所以brothers是sisters的两倍 第二个小孩是男孩，所以他看家里就是 3个男孩，3个女孩，所以，brothers 和sisters 一样多 看到类似的题，先逻辑分析一下，可以判断出第一个小孩是女孩，第二个小孩是男孩，接下来就...

我觉得应该A是B的两倍。

选择B twice as many A as B 这是一个固定的用法：B是A的两倍 Americans eat ___twice as many___ vegetable each person today as they did 20 years ago.当今美国人每人食用蔬菜的量是20年前的2倍

转外国网站回答："twice as many A as B"It’s the same as saying it in these alternative ways:—“A is twice as many/much as B.”“Twice as many/much A as B.”“Two times as many/much of A as B.”“B is half as many/much as A.”“Half as many/much B as A....

答案：D twice as many 翻译：在2004年奥运会上，中国获得的银牌数是美国队（获得的银牌数）的两倍。解释：此题考查倍数表达句型。该句型有一个如下：倍数词 + as + 形容词原级 + 名词 + as...如果表示“两倍”时，一般用twice，不用double 所以刚好是：twice as many silver medals as the U...