编制按（）的施工成本计划，通常可利用控制项目进度的网络图进一步扩充而得。
A．投资组织
B．时间进度
C．子项目
D．形象进度
参考答案：B
我国东南沿海地区夏、秋季节多台风，下列各图中能正确表示北半球台风气流状况的( )
Marko Tskitishvili, an economist, has been studying the drop in the price of the average household computer in the U.S. and wonders if computers should still be considered a luxury good or if it has now become a normal good. He conducts a survey of 500 people and finds the following:
Assume that 1998 is the base date. Based on the above data, Tskitishvili would conclude that a computer is a:（）
A. luxury good with income elasticity of 1.01.
B. normal good with income elasticity of 0.84.
C. luxury good with income elasticity of 1.18.
