传说谁创造了中国的字?()
A.仓颉
B.神龙
C.皇帝
D.炎帝
参考答案:A
任意四个点是不是可以作一个圆?请举例说明。
Which of the following is most likely to be considered a characteristic of an oligopolistic industry()
A. Few barriers to entry.
B. Few economies of scale.
C. A great deal of interdependence among firms.