The hoist line primarily used for lifting personnel on ship cranes is called the（）.

A . Keep a load on the hoist until all personnel are finished working B . Set the load on a movable dolly when transportation may be needed C . Have one man keep a hand on the load to steady it D . Insure that the lifting gear capacity is not exceeded

A . riggins B . gears C . boarding arrangements D . fitting

A . calculating amplitudes B . calculating great circle sailings by the Agiton method C . entering the Air Navigation Tables (Selected Stars) Pub 249 D . plotting on star finder

A . takes B . is C . has D . make

A . icebreaker support is finished B . icebreaker support is commencing C . the icebreaker is icebound D . the icebreaker is beset

A . speed begins to drop B . stops C . receives ice damage D . becomes icebound

A . a check valve will close that prevents reverse circulation B . a centrifugal counterweight counteracts the force of gravity C . the electric pump motor cut out D . the control lever will move to the stop positio

A . Proceed on present course and speed since the vessel is requesting a pilot B . Attempt to call the vessel on VHF radiotelephone and begin a search because the vessel has a man overboard C . Attempt to call the vessel on VHF radiotelephone because it is disabled D . Approach with caution because the vessel is stopped and making no way through the water

A . design of the anchor B . weight of the anchor C . scope of the anchor chain D . size of the vessel

A . a check valve will close that prevents reverse circulation B . a centrifugal counterweight counteracts the force of gravity C . the electric pump motor will cut out D . the control lever will move to the stop positio

A . Chain to chain connections B . Chain to anchor connections C . Kenter link to anchor connections D . Wire rope connectio

A . Keep well clear of the vessel because she is on fire and has dangerous cargo on board or she is leaking dangerous cargo B . Attempt to call the vessel on VHF radiotelephone because she is requesting to communicate C . Approach the vessel with caution because she is dragging her anchor D . Proceed on present course and speed since the vessel is requesting a tug

A . With foremarm vertical and forefinfer pointing up ,move hand in small horizonal circles B . With arm ertended downwards and forefinger pointing down,move hand in small horizontal crecles C . Extend arm with fingers closed and thumb pointing upward D . Place both fists in front of the body with the thumbs pointing outward

A . Notice to Mariners B . Coast Pilots C . nautical chart catalogs D . Sailing Directio

A．treatment of suicidal tendencies. B．causes of college students suicide. C．the problem and prevention of college students" suicide. D．functions and characteristics of crisis centers.

A．resolving a public dispute over gun control B．describing the effects of earlier studies on gun control C．analyzing the flaws in the previous theories about gun control D．summarizing the recent development in the studies of gun control 此题为多项选择题。

A．resolving a public dispute over gun control B．describing the effects of earlier studies on gun control C．analyzing the flaws in the previous theories about gun control D．summarizing the recent development in the studies of gun control 此题为多项选择题。

The author mentions the eruption of Mount St. Helens (lines 25 -26) primarily in order to emphasize which of the following points？ A．The deep and enduring effect that volcanic eruptions have on the environment B．The process by which classic volcanic eruptions tend to occur C．The relative dearth of cases with scientists can judge the effects of volcain eruptions D．A sample case with which later volcanic explosions are compared E．The global cooling effects of one of the best-studied volcanic eruptions

A line in the standard (x,y) coordinate plane is parallel to the x-axis and 6 coordinate units above it. Which of the following is an equation of this line？ A.y=6 B.x=6 C.y=6x D.y=x+6 E.x=y+6

A．the interpretation of the term "environment" B．the discussion on organisms and biological environment C．the comparison between internal and external factors influencing man D．the evaluation of man's influence on culture

A．supporting a proposition B．describing an event C．analyzing a problem objectively D．settling a dispute

A．evaluating the soundness of a work of criticism. B．comparing various critical approaches to a subject. C．discussing the limitations of a particular kind of criticism. D．summarizing the major points made in a work of criticism.

A．contrasting two theses and offering a compromise B．questioning two explanations and proposing a possible alternative to them C．paraphrasing the work of two historians and questioning their assumptions D．examining two theories and endorsing one over the other 此题为多项选择题。

A、 Perform Quality Assurance B、 Validate Scope C、 Control Quality D、 Define Scope