Americans eat ( ) vegetables per person today as they did in
2个回答

选A twice as many

解析:倍数的表达方式之一有:……倍数+as many(或much)+名词+其他+as…,所以选C

倍数表达总结:

1.用形容词表示甲是乙的几倍时,用下面三个句型,用副词表示则一般只用前两个句型.

(1)……倍数+形容词(或副词)的比较级+than

This rope is twice longer than that one.

这根绳的长度是那根绳的三倍.(比那根绳长二倍)

(2)……倍数+as+形容词(或 much)或副词+as

Asia is four times as large as Europe.

亚洲的面积是欧洲的四倍.

(3)……倍数+the size(length,height…)of

This street is four times the length of that street.

这条街是那条街的四倍长.

2.要用名词表示“量”的倍数时,则用以下两个句型:

(1)……倍数+more+名词(可数,不可数)+than

There are four times more books in our library than in yours.

我们图书馆藏书(数量)是你们图书馆藏书的四倍.(我们图书馆藏书比你们的多三倍.)

(2)……倍数+as many(或much)+名词+其他+as…

After the technique was introduced,the factory produced twice as many tractors in 1988 as the year before.

采用新的技术以后,那个工厂1988年生产的拖拉机是前一年(1987年)的两倍.(比前一年增长一倍)