As a ship moves through the water，it drags with it a body of

When is the density of the water required to be logged in the logbook of a ship?

A.Any time the vessel moves from water of one density into waters of a different density

B.Prior to getting underway when the vessel is floating in fresh or brackish water

C.Only when the vessel moves from fresh water into salt water

D.The density of the water is not required to be logged in the unofficial logbook

Which statement about damage control is TRUE ________．

A.A hole in the hull at the waterline is more dangerous than a hole below the inner bottom

B.The amount of water entering a ship through a hole varies inversely to the area of the hole

C.Water flowing into a lower compartment on a ship is more dangerous than water on deck or flowing into an upper compartment

D.Water flowing over the forecastle bulwark is more dangerous than a hole in the hull at the waterline

Water is the __46___ of all the things we eat and drink . Not many people understand this but __47____ quite true . The human body can go without ___48___ for a long time . We’ve got many examples for this . Yet two __49___ three days without water can usually make people __50____ . Man can’t live __51____ water .

Many people don’t understand how ___52__ water the human body needs __53___ work well , and many people , especially young people , do not drink enough , ___54__ in very hot weather . Our body has mostly water , about 65% to 75% . That is to say about two thirds of our body is water . When we do sports , some of the water will get away from our body . __55 _ we don’t drink some water , we won’t have enough water． And if we don’t have enough water , we’ll feel tired and many of us will get ill . So you know how important water is to us .

46.___________

( )46. A. important

B. most important

C. more important

D. different

In practice, it is usual for ship to be loaded _____ to improve the vessel’s movement through the water.

A.a little deeper aft

B.a little deeper forward

C.at the same draught between fore and aft

D.a balance between two sides

Heat exhaustion is caused by excessive ______.

A.loss of body temperature

B.loss of water and salt from the body

C.gain in body temperature

D.intake of water when working or exercising

After abandoning a vessel，water that is consumed within the first 24 hours will ______.

A.pass through the body with little absorbed by the system

B.help to prevent fatigue

C.quench thirst for only 2 hours

D.help to prevent seasickness

______water is the water to keep the ship’s stability．

A.Bilge

B.Ballast

C.Slop

D.Sanitary

Passage Two

Only one animal can walk 200 miles without stopping once to rest. It would take a person two days and two nights to walk this far, and only one man has ever done it without stopping. What amazing animal has such endurance? The camel! The camel is well known for something else, too. It can cross an entire desert without a single drink of water. Its body is built in a special way to help it store water and food.

A person has just one stomach, but a camel has quite a few. Within each stomach are layers and layers of cells. These cells are like tiny water balloons, storing liquids until the camel needs them. When the camel drinks, the cells grow larger and larger. For a whole week, they can keep the animal's thirst away by sending water to all parts of its body.

And did you ever wonder why the camel has a hump? The hump is a storage place for fat. Because it has this storage area, the camel does not need to eat very often. When the animal needs energy, the layers of fat serve as fuel to keep it going on the long, hot days in the burning sun.

The camel has one other gift that makes it well suited to arid regions. This gift is its amazing nose. A camel can smell a water hole from miles away!

When a camel moves it sways from side to side like a ship on a wavy ocean. Because of this swaying motion, the camel has been called the "Ship of the Desert."

40. The camel's hump is a storage place for ______.

A. muscles

B. extra water

C. body sugars

D. fat

If you wear extra clothing when entering the water after abandoning ship it will ______.

A.weigh you down

B.preserve body heat

C.reduce your body heat

D.make it more difficult to bteathe