题目

After the new technique was introduced the factory produced ______cars in 1994 as the year before. A. as twice many      B. as many twice    C. twice as many      D. twice as   答案：C倍数表达式：A+ be+倍数+ as +adj. / adv. (原级)+as +B。又如：The book is ten times as thick as that one。  整式乘除计算：（1）（-3a）2 （2）1998×2002（3）  （4）．