A thrust block is designed to（）.

A . O-ring B . gasket C . washer D . packing

A . block used only with manila rope B . chock roller C . hinged block D . strong block used for short，sharp pull

A . position the boat at the embarkation station B . lift the boat off the inboard chocks C . energize the winch for the falls D . set the brake on the winch

A . Create an HttpSessionListener class and implement the sessionInitialized method with that block ofcode. B . Create an HttpSessionActivationListener class and implement the sessionCreated method with thatblock of code. C . Create a Filter class， call the getSession（false） method， and if the result was null， then execute that block of code. D . Create an HttpSessionListener class and implement the sessionCreated method with that block of code.

A . becket B . loop C . swivel D . eye

A . connecting rods B . piston rods C . tie rods D . jack-bolt

A . blocks have been overhauled B . hauling parts of two tackles are attached C . hauling part leads through the movable block D . hauling part leads through the standing block

A .  The Pre-Block ACL is overwritten when a blockingaction is initiatied by the sensor B .  The blocking ACL entries generated by the sensor override the Pre-Block ACL entries C .  The Pre-Block ACL entries override the blocking ACL entries generated by the sensor D .  The Pre-Block ACL is replaced by the Post-Block ACL when a blocking actionis initiated bythe sensor E .  You can not configure a Pre-Block ACL when configuring IP Blockingon your sensor

A . store fluid under pressure B . act as a fluid reservoir C . provide overpressure relief D . replenish fluid to a system

A . eye splice B . short splice C . long splice D . block splice

A . carry low density cargoes B . protect fragile cargoes C . stow cargoes with concentrated weights such as machinery D . carry cargoes of very low stowage factor

A . piston skirt B . pinion C . crosshead D . compression ring

A . guide the bosun's chair down a stay when applying a protective coating B . run paint or tools up to a sailor in a chair with a heaving line C . keep a bosun's chair from swinging with the ship's motion D . reeve the gantline through

A . transmit the thrust of the engine to the propeller B . transmit the thrust of the propeller to the vessel C . absorb the shock of wave pressure at the bow D . be placed between the engines and the foundation to absorb the vibratio

A . control axial movement of the crankshaft B . transmit engine thrust to the propeller shaft C . absorb vibrations in the propeller shafting D . prevent propeller thrust from being transmitted to the hul

A . snatch block B . threefold purchase C . handy-billy D . chockablock

A．connecting rods B．piston rods C．tie rods D．jack-bolt

A.piston skirt B.pinion C.crosshead D.compression rings

是 否