The reason for making water resources regenerative is of natural（）
A. run-off
B. hydrological cycle
C. evaporation
D. precipitation
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The condition for the formation of heavy rain is（）
A. the area which has sufficient water vapor sources and high temperature
B. the area which has sufficient water vapor sources and low temperature
C. the area which has sufficient water vapor sources and strong upward movement of air
D. the area which has sufficient water vapor sources and no strong upward movement of air
Hydrological forecasting is to predict the scale and time course of a hydrological variable（）
A. during any period
B. during a foreseeable period
C. since a long time ago
D. at a certain moment
Water is a type of（）
A. inexhaustible resource
B. renewable resource
C. non-renewable resource
D. unlimited resource
全面质量管理的基本要求有（）
A全员的质量管理
B．全过程的质量管理
C．全企业的质量管理
D．多方法的质量管理
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