A common trouble with the fuel pump plungers or fuel valve spindle is （）.

The discharge rate or capacity of a centrifugal pump will vary directly as the （）.

抑制心肌细胞膜上Na+，K+-ATP酶的药物是

Na⁺泵转运Na⁺、K⁺属于（）

葡萄糖顺浓度梯度进入一般细胞属于（）

静息状态下K⁺由细胞内向膜外扩散属于（）

Na+泵转运Na+、K+属于（　　）。

Na+泵转运Na+、K+属于（）

Na+ 泵转运Na+ 、K+ 属于（　　）。

正常细胞外Na+浓度是细胞内Na+浓度的（）。

（）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.

When installed for bilge pumping or ballast duty, centrifugal pumps require a （） to remove air from the suction pipe.

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

Under centrifugal pumps are the volute, diffuser, mixed-flow, axial flow and （） or regenerative types.