（）是反映市场成长性的重要指标，影响项目建成后的市场需求。
A．有效需求
B．潜在需求
C．未来需求
D．需求增长速度
参考答案：D
____ in a poor peasant family, the boy was unable to go to school. [ ]
A. Being born
B. Born
C. Having been born
D. Being proved
设SOP假，下列判断中为假的是（）。
A、SEP
B、PIS
C、SAP
D、PES
