简述吸管虫引起的鱼病的主要特征。
During working, thermostatic expansion valve should be （）. ["either all the way open or all the way closed","normally fully open","throttled depending on load","controlled by liquefied pressure"]
关系营销要求建立专门的部门，用以跟踪顾客、经销商、供应商及营销系统中其他参与者的态度，由此了解关系的动态变化，及时采取措施消除关系中的不稳定因素和不利于关系各方利益共同增长的因素。这体现了关系营销本质特征中的（）。 ["双向沟通","合作","双赢","控制"]
Which element(s) should be taken into account in the preparation of the “Cargo Securing Manual”?（） ["Weight of the vehicles","Geographical area of the voyage","Dynamic forces under adverse weather conditions","All of the above"]
快易理财通过专业版开通后需要经过（）审核可进行转账汇款。 ["0天","3天","5天"]
加水量小对烧结有什么影响？
