按照金属切割过程中加热方法的不同大致可以把切割方法分为（）。
A、火焰切割
B、气割
C、电弧切割
D、冷切割
E、等离子弧切割
参考答案：A, C, D
The house rent is expensive. I've got about half the space I had at home and I'm paying _____ here. [ ]
A. as three times much
B. as much three times
C. much as three times
D. three times as much
民主政治中，公共部门绩效评估的新取向是（）
A.经济
B.效率
C.效果
D.用户满意
