城市规划脱胎于哪个学科（）
A.建筑学
B.经济学
C.管理学
D.心理学
参考答案：A
All else being equal, an increase in the price of one product will most likely cause the demand curve of the product's supplement to:（）
A. Remain unchanged.
B. Shift upward and to the right.
C. Shift downward and to the left.
能源对环境的污染主要表现在哪些方面？
