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当前学科：化工总控工中级
题目：
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响流体压力降的主要因素是（）。
A . A、温度
B . B、压力
C . C、流速
D . D、密度
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中国是世界上第二个拥有抗虫基因自主知识产权的国家，在国际上首次成功创建高产量、高纯度、高效率、低成本的转抗虫基因三系杂交棉及育种新体系。转基因抗虫棉推广应用后增产可以超过（），年新增的皮棉相当于目前1000万亩棉田的总产量，等于再造一个长江流域棉区。
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简述知识管理基本概念及其基本特征。
氯化苦
A carrying vessel grounded in transit. In order to refloat it, the captain backed the vessel, but the engine was severely damaged and there was a big hole on the bottom of the vessel. Immediately the water seeped into shipping space and partial cargoes suffered losses. The captain managed to pilot the ship to a port to repair the vessel. It took ten days to recondition the vessel. During the process of unloading and repairing, various kinds of expenses incurred. At last, the vessel sailed again. Very soon, the vessel caught fire. To protect the goods and vessel, the captain ordered to pour water into space. Some stationery was burned down and some was soaked. All the tea was soaked. Question : Please analyze the nature of all kinds of losses and expenses and point out what kind of insurance should be covered. (Translate the case into Chinese and then answer the question) Helpful hint : The case is mainly about C. A. , P. A. and F. P. A..
( )精基准选择应尽量使定位基准与设计基准重合，从而避免基准位移误差。
疟疾的主要传播方式是（）
不具有利胆保肝作用的中药是（）
平面上，两条相异直线不平行就一定相交。