As long as the vessel is capable of performing the service immediately required，hire will （）. ["cease to be payable","begin to be withdrawn","continue to be payable","be returned"]
Which of the following statements about pump operations is NOT a correct statement?（） ["In order for a fluid to be pumped, a fluid must be made to flow","A substance must be cold in order for it to be pumped","The kinetic energy imparted by the pump can be used to force a liquid through a hydraulic system","A pump must receive its energy from an external source"]
保护现场的原始状态，包括（）不随意挪动位置。 ["人员","痕迹","车辆","散落物"]
在Windows 98中，若要恢复回收站中的文件，在选定待恢复的文件后，应选（）命令。 ["还原","清空回收站","删除","关闭"]
要删除文件或文件夹首先应（）。 ["选定要删除的文件或文件夹","清空回收站","打开回收站","对文件或文件夹进行剪切"]
设计一个测定水分运输速度的实验。
