After the mew technique was introduced ,the factory produced in 2001 as the year before.
A. as twice many machines
B. twice many as machines
C. as many machines twice
D. twice as many machines
网友回答
A. as twice many machines
B. twice many as machines
C. as many machines twice
(答案→)D. twice as many machines
解析：表示倍数.分数.百分比的词应放在as…as或形容词的比较级或the n of之前，故选D。