影响商品需求的因素主要包括( )。
A.消费者的偏好
B.消费者的收入水平
C.该商品本身的价格
D.政府的政策
E.相关商品的价格
参考答案:A,B,C,D
As I waited for Mike to arrive, I ________ the clock and saw that he was late.[ ]
A. glanced at
B. stared at
C. glared at
D. watched over
山地等高线的标高由里向外逐渐()。