机械性损伤（mechanical injury）

[名词解释] 损伤（injury）

[名词解释] 机械式传播（mechanical transmissin）

[名词解释] 亚致死性损伤（sublethal cell injury）

[名词解释] 机械性损伤

[单选题]In a simple mechanical governor, the （）.A . centrifugal force rotates the ball-headB . flyweight centrifugal force is balanced by spring forceC . flyweight centrifugal force is balanced by hydraulic pressureD . speeder spring alone actuates the fuel

[单选题]The mechanical efficiency of an engine （） because losses occur in the form of friction.A . is always less than 100%B . is always more than 100%C . is always equal to 90%D . is always less than 90%

[单选题]The conclusion that mechanical efficiency is always （） 100 percent is correct.A . small thanB . more thanC . little thanD . less tha

[名词解释] 冷害（chilling injury）

[单选题]机械性损伤局部表现（ ）。A．疼痛B．肿胀C．功能障碍D．伤口或创面E．伤情不同均可以表现

[单选题]Mechanical lubricators for diesel engine cylinders are usually small reciprocating pumps which are （）.A . operated manually once an hourB . operated until the engine has startedC . placed into operation only at maximum loadD . adjustable to meet lubr