During fueling operations, which of the listed precautions should be taken when topping off fuel tanks?（） ["Reduce the pumping rate by closing the deck filling valve","Close all overflow valves","Place 5 gallon containers under all flange connections in the fuel line","Reduce the pumping rate and sound tanks frequently as the level rise"]
中国历史上第一位大思想家大教育家是（）。 ["老子","孔子","孟子","韩非子"]
下列有关人Rh血型系统的说法，正确的是：（） ["Rh阴性个体的血清中存在Rh抗原的天然抗体","Rh阴性受血者在输入Rh阳性血液后，会发生凝集反应","Rh抗体可透过母亲胎盘，作用于胎儿的红细胞","Rh阴性母亲一旦怀有Rh阳性胎儿，胎儿则由于红细胞的凝集而死亡"]
Why is it important for fuel oil tanks not to be topped off at the inner bottom level when loading on a cold day?（） ["Increased viscosity of the product needs higher loading pressure, which increases the chances of a spill","Air pockets may cause the fuel to bubble out of the ullage hole","The temperature rise of the fuel will cause an overflow","Fueling valve may become stuck closed and cause the fuel oil to spill before the valve can be opened"]
心力衰竭引起组织水肿的主要原因是：（） ["毛细血管压增高","血浆蛋白减少","毛细血管通透性增高","淋巴液回流受阻"]
解释水产养殖投喂饵料的“四定法则”。
