The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?()
A. Faulty thermostatic bypass valve
B. Eroded zinc pencils in the heat exchanger
C. Steam formation in the expansion tank
D. Excessive leakage from jacket water pump seal
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某女,50岁,月经淋漓不尽20余天,量少色淡,精神萎靡,小便清长,夜尿频数,舌淡胖边有齿痕,苔薄白,脉沉细,证属()
A. 脾虚型
B. 肾阴阳俱虚型
C. 肾阴虚型
D. 肾阳虚型
E. 脾肾阳虚型
资本主义商业利润的实质是()
A. 商品贱买贵卖的差额
B. 从事商品销售的劳动创造的价值
C. 商品批发价格和零售价格之间的差额
D. 产业工人在生产过程中的剩余劳动所创造的剩余价值的一部分
乙型脑炎(简称乙脑)的主要传染源是()
A. 猪
B. 乙脑病毒携带者
C. 鱼
D. 蚊虫
E. 蟋蟀