A water jacket is placed around the exhaust manifolds of propulsion diesel engines to（）

A . dive head first，using your hands to break the surface of the water B . hold your arms firmly at your sides and jump feet first C . jump feet first，covering your nose and mouth with one hand and grasping the opposing upper arm with the other D . jump feet first，holding your knees to your chest

A . place standby cooler in operation B . reduce engine load C . check thermostatic valve D . clean sea water strainer

A . dry liner B . wet liner C . jacket liner D . corrugated liner

A . dispose B . dissolve C . heat D . dissipate

A . cylinder covers B . lubricating space C . crosshead D . exhaust manifold

A . an engine-driven；as well B . an engine-driven；has an independent pump C . an independent；as well D . an independent；has an engine-driven pum

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

A . regulating the level of corrosion inhibitor in the primary cooling system B . the level of the freshwater expansion tank C . varying the engine load to meet temperature requirements D . the operation of the thermostatic valve

A . dividing walls B . divided walls C . dividing liners D . divided jacket

A . causes colloid suspension in the cooling water B . reduces the capability of the lubrication system C . can form pockets which block the flow of coolant through the system D . leads to the scuffing of cylinder wall

A . The mariners try to put out fire on board of vessel B . The people on board try to survive themselves from a ship in perils C . The salvors take actions to rescue the survivors at sea D . The pilot come on board from his boat in bad weather

A . Ⅰ only B . Ⅱ only C . both Ⅰ and Ⅱ D . neither Ⅰ and Ⅱ

A . 正确 B . 错误

A . gradient current B . density current C . swift current D . torrent current

A . Faulty thermostatic bypass valve B . Eroded zinc pencils in the heat exchanger C . Steam formation in the expansion tank D . Excessive leakage from jacket water pump seal

The man who runs the Attic Hall Hotel is Nils Yngve Bergqvist. He built his first ice building for an art exhibition in 1991 and he designed the present hotel—over 200 meters square—himself. It took workmen about two months to pile 1,000 tons of snow onto a wooden base. As the weather got colder, the snow froze and then they removed the base. The whole building and everything in it are made of snow—except for the wooden front door. There's a theatre which Nils uses for a jazz club, a radio station and a large ice bar. As you can imagine, hot drinks are popular with the guests! The rooms have no doors; there's no furniture, no heating and everyone sleeps on ice beds. But the 800 people who stayed at the hotel this winter seemed to like it. If you want to stay in one of the ten ice rooms, it will cost you about ￡30 a night. You will receive a survival certificate from the manager. When the winter's over, Nils holds his annual contest to predict the day that the hotel will fall. The person that guessed the day correctly last year receives a large painting from an ARTic Hall exhibition. Nils's ice hotel is becoming world-famous and he loves his work.. He's already excited about his next project — an ice hotel that will have more complicated architectural features and, he says, will be bigger and better. What do we know about the Artic Hall Hotel？ A．It is completely made of snow. B．It is designed by Nils's friend. C．It is built once a year. D．It has a wooden base.

—（） A．That’s right. B．You’re right. C．No, it ’s not here. D．Yes, I think so.

A．instructed B．inquired C．forbidden D．strived

______

A．A.not enough B．B.smaller C．C.big enough

A、Wants to limit the loss on a long position. B、Thinks that the stock is overvalued. C、Wants to limit the loss on a short position.

A．That's all right. B．You're well. C．No, it's not here. D．Yes, I think so.