Farmers use water in many ways.（） they use water to grow crops.

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  A . for precise navigation in coastal waters B . by measuring the phase difference of the dots and dashes C . as an aid to ocean navigation D . if the vessel is fitted with a special Consol receiver

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• In a central cooling system, used in some modem ships, sea water is supplied to cool （）which will circulate to other individual cooler, greatly reducing the corrosion problems.

  A . fresh water B . sea water C . cooling oil D . emulsio

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• When anchoring，good practice requires 5 to 7 fathoms of chain for each fathom of depth. In deep water you should use（）.

  A . the same ratio B . more chain for each fathom of depth C . less chain for each fathom of depth D . two anchors with the same ratio of chai

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• Pipes made of plastic are now widely used in building as they are light and do not become （）in water.

  A、ripe B、instant C、rotten 腐蚀的，恶臭的 D、mature

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• The officer of the watch should use radar when appropriate and at all times in（）waters.

  A . congesting B . congested C . congestion D . congest

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• The sludge tank installed in the diesel engine room is used to collect（） Ⅰ.sludge from the fuel oil settling tanks ad centrifuge Ⅱ.water that has been collected in the settling tank

  A . Ⅰonly B . Ⅱ only C . bothⅠand Ⅱ D . neitherⅠor Ⅱ

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• Diesel engine jacket water is used in the distillation process as the （）.

  A . coolant for the distillate B . coolant for the brine cooler C . means of heating the feedwater D . primary means of producing a vacuum within the distiller

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• The use of （）in many ways reduces staffing needs, minimizes in transit damage and theft, shorten time in transit because of reduced port turnaround time.

  A . Container B . Supertanker C . Pallet D . Integration

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• In a chilled water air conditioning unit using a reciprocating compressor, the refrigerating effect of the primary refrigerant can be increased by （）.

  A . increasing refrigerant pressure in the coil B . increasing chilled water flow through the cooler C . sub-cooling the refrigerant in the condenser D . superheating the refrigerant in the compressor

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• In more recent years，（）has been used by civilians in many new ways to determine positions，such as in automobile and boat navigation，hiking，emergency rescue，and precision agriculture and mining.

  A、GPS B、GMDSS C、AIS D、Navtex

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• How many grammatical case suffixes that are used with nouns in Mongolian?

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• One should use as many examples as possible in an example essay.

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• The amount of water used in the manufacturing process is enormous, but the amount wasted is______.

  A．the greatest B．more greater C．greatest D．even greater

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• People in Bangladesh can use____as a safe source of drinking water.

  A．ground water B．rainwater C．drinking water D．fresh water

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• Agatha Christie lived in Penzance and used many of the town's. settlngs in her widely read mysteries.

  A．Y B．N C．NG

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• In order to use the water from the stove, there be a pipe connecting the tub with the stove.

  [A] must [B] seemed to [C] needn't [D] should

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• The color and smell of water in these rivers_____itself how serious the pollution is but many people are still ignoring he fact.

  A．illustrates B．demonstrates C．manifests D．exemplifies

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• Salt is as necessary to life as water. In many areas of Africa people once drank the urine (尿) of animals because they had no other source of salt. Without salt, human beings die.

  The human body demands that the amount of salt in the blood always stay the same.When the body does not get enough salt, it protects itself by letting less salt leave the body in urine and sweat. But it cannot reduce this output to zero. Some salt is always escaping. On a completely saltless diet, like that of some people in Africa, the body steadily loses small amounts of salt through the kidneys (肾) and sweat glands (腺). It then tries to ad-just to this loss by speeding up its secretion (分泌) of water. In this way, the body attempts to keep the amount of salt in the blood at the necessary level. The result is a slow drying up of body and, finally, death. The person dies of thirst. In cases where there is little or no water to drink, the body tries to do the opposite thing. Again, it must keep the salt level in the blood constant. Because it has little water, it attempts to stop water from leaving the body and to increase its secretion of salt. But, as with the escaping salt, it cannot be completely successful. Some water still leaves and the person eventually dies of thirst. In short, the body's normal needs for salt and for water are both parts of the same important need to keep the salt level in the blood constant. Some African people once drank animal urine______. A．when they were going to die B．because they were thirsty C．because there was little salt D．because they were short of water

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• Renewable energy sources can be replenished in a short period of time. The five renewable sources used most often include hydropower (water), solar, wind, geothermal, and biomass. Renewable energy's impact on the world's energy picture is significant. Many important events have occurred during the history of using renewable sources to generate electricity--but the overall consumption from renewable energy sources has declined by about 15 percent from their I996 peak to about 6 quads in 2005.

  The use of renewable energy is not new. Five generations (125 years) ago, wood supplied up to 90 percent of our energy needs. Due to the convenience and low prices of fossil fuels, wood use has fallen. Now, the biomass which would normally present a disposal problem is converted into electricity (e.g., manufacturing wastes, rice hulls, and black liquor from paper production). Historically, low fossil fuel prices, especially for natural gas, have made growth difficult for renewable fuels. The deregulation and restructuring of the electric power industry could have a major impact on renewable energy consumption. Demands for cheaper power in the short term would likely decrease demand for renewable energy, while preferences for renewables included in some versions of proposed electricity restructuring legislation would breathe new life into this industry. Use of renewables in the United States is not currently expected to approach that of the major fuels, and due to their limitatious (e.g., their intermittent nature-cloudy days have no solar gain, quiet days mean no wind blows to drive wind turbines, dams are primarily for flood control, so hydroelectricity production varies as dams' water levels change), renewables may never provide "the" answer to all energy problems. Around the world, renewable energy is proving to be of great value. In 2005, about 6.1 Quadrillion Btu (Quads) of U.S. energy came from renewable fuels. Each of the energy sources we use is measured, purchased, and sold in a different form. Many units of measurement are used to measure the energy we use each day. From 1996 to 2005, the trend of the consumption from renewable energy was ______. A．increasing B．decreasing C．irregular D．not mentioned

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• Man depends on water for many things. He needs it for drinking. He needs it for growing food. He needs it for keeping himself clean and free from illness. He needs more and more water for industry. People often forget how necessary water is for industry. Imagine, for example, the immense quantities of water used by the great cooling towers of steel works. The demand for water is growing every day. It is closely connected with the increasing population and with the pressing problem of providing enough food. But the world has not yet found ways of storing enough water to satisfy all these important needs, not even in west countries like England. Great efforts are being made today to store water, particularly in hot countries where the rainfall is small.

  Three-quarters of the world is covered with water. But only three percent of this water is fresh. All the rest is salt, and fills the oceans and the great inland seas. It is the salt that makes sea water useless to man. If you take the salt away the water can be used for drinking and for watering plants. In 1962 President John Kennedy of the United States said, "When man discovers how to mm salt water into fresh water cheaply, he will have made a much more important scientific advance than when he first landed on the moon". Human beings need water for【46】,【47】and【48】and【49】. Main idea: The【50】

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• English is widely used. Many business letters around the world ___ in it.

  A．a re written B．were written C．a re writing D．were writing

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• What rhetoric device is used in the sentence 'Many hands make light work'

  A．Synecdoch B．Simile C．Metaphor D．Oxymoron

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