Ocean currents are well defined and（）.

A . In the Coast Pilot B . In the Nautical Almanac C . In the List of Lights D . In the Sailing Directio

A . the North Atlantic Drift B . the Brazil Current C . the Labrador Current D . the Falkland Current

A . clockwise around the North Atlantic and North Pacific Oceans B . clockwise or counterclockwise depending on whether it is warm or cold current C . counterclockwise except in the Gulf Stream D . counterclockwise around the North Atlantic and North Pacific Ocea

A . North Cape Current B . Labrador Current C . Greenland Current D . North Atlantic Current

A . crossing your course in the same direction B . crossing your course in opposite directions C . parallel to the pier from ahead D . setting you on the pier

A . fail to provide spring in the hawser B . cause unequal distribution of the load to one leg C . cause the bridle legs to jump clear of the chocks or fairleads D . None of the above

A . density differences of the water B . rotation of the earth C . direction of primary circulation of air D . all of the above

A . in an area of high density the water's surface is lower than in an area of low density B . surface water flows from an area of high density to one of low density C . the lesser the density gradient the freer the water is to move D . it is the density differences that cause the currents to stay in the trough

A . U-Type and posilok shackles B . C-Type and wedge shackles C . D-Type and bow shackles D . wedge and kenter shackle

A . the density of the water B . the air temperature C . the presence of a high pressure area near it D . underwater soil conditio

A . humidity B . varying densities of water C . vessel traffic D . the jet stream

A . number of product features B . return on investment C . competitiveness D . regulation E . day one costs F . availability of budget

A . high density will be on the left in the Northern Hemisphere B . high density will be on the right in the Southern Hemisphere C . low density will be on the left in the Northern Hemisphere D . low density will be on the left in the Southern Hemisphere

A . Armature and equalizer B . Commutator and brushes C . Rotor and interpoles D . Field and exciter

A、a large body of salt water that covers approximately 70% of the earth’s surface B、appears different shades of blue C、often with waves and currents D、contains various types of plant and marine animal life E、peace F、tranquility G、expansiveness H、the unknown I、the power of nature 此题为多项选择题。

是 否

A、The computers B、Computers C、A computer D、An computer