A“chock” is a（）.

A . double sized mattress consists of more than 890 coils B . spar extending from a mast or a king post C . flap（Becker rudder）can be fitted to the rudder’s trailing edge D . bridle arrangement having a long beam of the length of the container

A . deeply-grooved drum on the windlass with sprockets which engage the links of the anchor chain B . winch that is running out of control due to a failure of the overspeed trips C . line that has jumped off the gypsyhead while under strain D . nylon line that parts under strain and whips back in a hazardous manner

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

A . mooring line made of spring lay wire rope B . mooring line running diagonally to the keel C . mooring line parallel to the keel D . wire rope used for securing an anchor buoy

A . wormed，parceled，and served B . wrapped with heavy tape C . wrapped with chafing gear D . wrapped in leather

A . cross connection line between two main fire lines B . special wrench for the couplings in a fire hose line C . tackle rigged to support a fire hose D . none of the above

A . conductivity higher than a normal conductor B . conductivity higher than a normal insulator C . high conductivity at low temperatures D . low conductivity at high temperature

A . tree or long awash in a nearly vertical position B . crew member who refuses to work C . upstream end of a load wall D . buoy that is adrift

A . activity B . event C . phase D . process

A . grooved wheel in a block B . line to hold a lifeboat next to the embarkation deck C . partial load of grain D . seaman's knife

A . is a deck fitting used to shackle gear to the deck B . permits easy jettisoning of deck cargo in an emergency C . prevents stress concentration in the bulwark D . provides openings through the bulwark for mooring line

A . mallet used when splicing wire rope B . sharp pointed crow bar used to unlay wire rope C . tapered steel pin used to separate wire rope D . tapered wooden pin used when splicing heavy rope

A . red-and-white octagon B . daymark with a yellow stripe on it C . green square D . yellow diamond

A、cylindrical projection B、simple conic projection C、polyconic projection D、rectangular projection

A . pragmatic B . grammatical C . mental D . conceptual

A．Which B．That C．What D．Where

A．pidgin B．creole C．dialect D．lingua franca

是 否