The nozzle of a gasoline hose or can should be kept（）.

A . Foam B . Solid stream water nozzle C . All-purpose nozzle D . Carbon dioxide

A . injector B . compressor C . diffuser D . sipho

A . compression must be low for effective spark ignition B . compression must be low for required horsepower and torque generation C . compression must be low to prevent pre-ignition D . compression must be low to have effective pre-ignitio

A . can fit any size hose B . converts a stream of water into a fog C . increases the amount of water reaching the fire D . can spray two streams of water at the same time

A . erosion and cratering of the nozzle orifices B . fuel leakage into the nozzle drain line C . fuel leakage before and after injection D . insufficient fuel delivery though that nozzle

A . The fuel metering will vary B . The fuel will explode C . The cylinder head will crack D . The engine will sto

A . no fuel will be delivered through the nozzle B . the nozzle will overheat and crack C . time of injection will change D . fuel will leak into the drain line

A . In open air B . Inside cabins near the overhead C . In the machinery space near the engine air intake D . Underwater

A . excessive fuel nozzle holder cooling B . sediment in the fuel supply C . distortion of the fuel spray pattern D . improper atomization of the fuel

A . The amount of fuel injected will be increased B . The start of injection will be retarded C . The nozzle will permit fuel to dribble D . The spray pattern will be distorted

A . in open air B . inside cabins C . in machinery space D . underwater

A . high firing pressure B . overload of that particular cylinder C . smoky exhaust D . cooling water temperature rise

A . keep ports，doors，windows，and hatches closed B . start engines immediately C . ventilate before starting engine D . None of the above

A . Increase the thrust of the propeller B . Protect the propeller from striking sawyers C . Prevent the propeller from striking barges towed on the ship D . Prevent the propeller from touching bottom in low water

A . lower compression pressures B . overheating without smoking C . failure to start D . a run away without load

A . the Matitime Code of China B . Certificate of Inspection C . Oil Transfer Procedures Manual D . IOPP Certificate

A . as much fuel as B . less fuel than C . less fuel as D . more fuel tha

A . shield fire fighters from radiant heat B . break up burning material C . get the most water possible on the fire D . drive heat and smoke ahead of the fire fighter

A . the hose could burst B . the nozzle end will whip about causing damage or injury C . water damage to vessel's cargo or structure D . personnel might trip over the hose

A . shut B . fog C . solid stream D . spray

A . avoid using liquid-cooled nozzles whenever possible B . avoid low cooling water temperatures C . avoid prolonged overloading of the engine D . make certain the gasket seal between the nozzle and cylinder head is tight

The crisis has 【C2】______ questions about the large oil companies and windfall 【C3】______ . Critics of the oil industry charge that the major companies are getting richer because of the oil shortage. Shortage, of course, drives prices up. As oil prices rise, the critics say, the oil companies will make more money (windfall profits) without doing a thing to 【C4】______ the extra cash. "Windfall" profits are sudden unearned profits--profits made 【C5】______ luck, or some special turn of events. The word itself tells what "windfall" means--something blown down by the wind, such as trees, or fruit 【C6】______ from trees. But the word has taken on a special meaning. This meaning (getting something unearned) was first used in medieval England. This is 【C7】______ it started: at that time much of the land was in the hands of 【C8】______ barons. The rest of the people, commoners, lived and worked on their vast estates. They planted the seed, cared for the farm animals and harvested the crops. Not all the land, however, was used for farming. Every baron kept a large private forest for 【C9】______ deer and wild bear. When hungry, the people sometimes would kill the animals in the lord's forest for food. And there were times 【C10】______ they might cut down trees for fuel. So, strong laws were passed to protect the forests, and the animals. Violations were severely 【C11】______ . But there was one way people could get wood from the forest. If they found trees blown down by the wind ("windfall") they were free to take them for use as fuel in their homes. And that is the meaning that has come down to us--something good gotten by luck or 【C12】______ . The common people of old England, often hungry and cold, must often have prayed for a good strong wind. Critics today 【C13】______ that the oil industry has also been praying for something just like it --some political or military 【C14】______ that might produce a windfall--a rise in oil prices and profits. The oil companies deny that this is so. In Congress, critics of the oil companies have proposed a 【C15】______ on such profits. The debate on rising oil price will go on for some time, and most likely we will hear more and more about windfall profits. 【C1】______ A．threatened B．claimed C．explored D．narrowed

此题为多项选择题。

A、-$2.00 B、$0.00 C、$1.00 D、$2.00