【简答题】水文现象具有时程变化的( )与( )的对立统一,地区分布的( )与( )的对立统一。
【单选题】图像数字化过程中的采样点的间隔大小决定了图像________的多少。
【单选题】水文现象在时间和空间上的变化过程与其他自然现象一样,具有必然性和偶然性,水文学中习惯称必然性为确定性,称偶然性为()。
【单选题】Which one of the following will drastically affect the performance of the insulation material, if the cable is exposed to?
【判断题】CPFR要求供应链各环节充分合作,也就是将各环节的商业机密都要充分共享。( )
【判断题】The structure of a material depends on how it is processed, and a material's performance is a function of its properties.
【判断题】High yield strength is beneficial to material cold forming and welding performance improvement.
【单选题】Which material has the best casting performance ?