A tank 36 ft. by 36 ft. by 6 ft. is filled with water to a depth of 5 ft. If a bulkhead is placed in the center of the tank running fore-and-aft along the 36-foot axis，how will the value of the moment of inertia of the free surface be affected?（） ["The moment of inertia would remain unchanged","The moment of inertia would be 1\/4 its original value","The moment of inertia would be 1\/2 the original value","None of the above"]
气层的含气饱和性能称为（） ["绝对饱和率","相对饱和率","饱和率","渗透率"]
有关韧皮部运输机制的压力流动学说，下列哪些描述是正确的？（） ["维持筛管中液流靠源端和库端间的膨压差推动","该机制无关渗透势的变化","韧皮部运输机制完全不耗能","源库端的装载是耗能的主动运输过程","源库端的卸出是不耗能的被动运输过程"]
气田集输流程分为（） ["单井集输流程","多井集输流程","气田集输管网流程","常温分离工艺流程"]
一张空白全新的软盘，在使用前要先经过（）才能使用。 ["文件化","拷贝","格式化","检查"]
升格镜头
