The Bill of Lading is described as（）if the shipowners agree that the cargo were received on board in good condition. clean。 dirty。 foul。 claused。
The suction - force principle of operation is a typical characteristic of （）. centrifugal pumps。 jet pumps。 propeller pumps。 reciprocating pum。
Air leakage between the shaft and stuffing box packing in a centrifugal pump is prevented by （）. a compressed packing gland。 lantern tings between the packing rings。 a liquid seal。 the stuffing box gland。
工会应当健全职工服务体系，创新服务方式，组织下列哪些活动（） 法律服务。 困难帮扶。 心理关爱。 文化体育等活动。
在Windows XP的“回收站”中，鼠标左键点击一文件，将会出现（）按钮。 复制。 粘贴。 删除。 还原。
The bill of lading cannot vary or add to the terms of the charter-party unless it（）an express provision to that effect.
