第5题: [单项选择]Ethanol is commonly used as a gasoline supplement, but it is currently about()methanol. A. twice as expensive as B. twice as more expensive as C. as twice more expensive as D. as twice expensive as 参考答案:A
第23题: [单项选择]Such policies have also enabled companies such as McMullens to take advantage of recession- ary periods rather than be forced into taking______ measures. A. panic B. illegal C. radical D. invalid 参考答案:A