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Americans eat __ vegetables per person today as they did in

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Americans eat __ vegetables per person today as they did in 1910.
A.more than B.as twice as many C.twice as many as D more than twice as many
D
这里考察倍数的表达,通常有三种
1.倍数词+as+形容词/副词原级+as,所以BC错
2.倍数+形容词(或副词)的比较级+than
3.倍数+the size(length,height…)of
eg.This street is four times the length of that street.这条街是那条街的四倍长