A.They may not be able to inflate their balloons.B.There are too many balloons to launch at once.C.Their flight pattern could be uncertain due to the wind.D.Theyll lose money if some balloons cant take off,

A . exchange navigational information between vessels B . exchange navigational information between a vessel and a shore station C . conduct necessary tests D . exchange operating schedules with company dispatcher

A . when the tablespace is online B . when the tablespace has segments with data in it C . when the tablespace is a default permanent tablespace for the database D . when the tablespace contains a table that is currently being used by transactions E . when the tablespace contains undo data that is needed to rollback an uncommitted transactio

A . When the vessel is in an overloaded condition B . When the vessel has arranged for both duplication of equipment AND shore-based maintenance C . When the vessel has replaced a required piece of GMDSS-related equipment but its performance has not been verified or logged D . When the vessel is carrying only two licensed GMDSS Radio Operators and is capable of performing all required functio

A . a networked society capable of constant monitoring B . the widespread application of internet and related technologies C . the invention of more devices which can be connected to the internet D . mobile communications capable of internet access

A . despatched B . detained C . detected D . delivered

A . strange B . puzzled C . l one D . lonely

A．improve your work environment B．cut your utility bills by half C．get rid of air-conditioners D．enjoy much better health

Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks. The genetic rejuvenation won't reverse other damage caused by time for the mouse, but could help its liver metabolize drugs or get rid of toxins. Spindler's team fed three mice a normal diet for their whole lives, and fed another three on half-rations. Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old—equivalent to about 70 human years. The researchers checked the activity of 11,000 genes from the mouse livers, and found that 46 changed with age in the normally fed mice. The changes were associated with things like inflammation and free radical production—probably bad news for mouse health. In the mice that had dieted all their lives, 27 of those 46 genes continued to behave like young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 percent of these gene changes. "This is the first indication that these effects kick in pretty quickly," says Huber Warner from the National Institute on Aging near Washington, D.C.. No one yet knows if calorie restriction works in people as it does in mice, but Spindler is hopeful. "There's attracting and tempting evidence out there that it will work," he says. If it does work in people, there might be good reasons for rejuvenating the liver. As we get older, our bodies are less efficient at metabolizing drugs, for example. A brief period of time of dieting, says Spindler, could be enough to make sure a drug is effective. But Spindler isn't sure the trade-off is worth it. "The mice get less disease, they live longer, but they're hungry," he says. "Even seeing what a diet does, it's still hard to go to a restaurant and say: 'I can only eat half of that'." Spindler hopes we soon won't need to diet at all. His company, Life Span Genetics in California, is looking for drugs that have the effects of calorie restriction. According to the passage, which of the following is NOT true？ A．Eating less than usual might make us live longer. B．If we go on a diet when old, we may keep healthy. C．Dieting might not be needed. ~ D．We have to begin dieting from childhood.

[A] I can’t say so [B] I expect so [C] I’m sure so [D] I don’t know so

A．She knows where Martha has gone. B．Martha will go to the concert by herself. C．It is quite possible for the man to find Martha. D．The man is going to meet Martha at the concert.

A．Y B．N C．NG

W: Oh, please be serious! I suppose they will change shapes as well. If you want a big car to take all your friends camping, I suppose you'll just be able to snap your fingers and make it happen. Or if you want a sporty two-seater, you could just tell the car what you wanted, and it would do the rest. Is that how it will work？ M: No, I am serious. They have found a way to alter the surface of metals so that they can reflect different colors just by passing a small amount of electricity over them. W: Oh, I see. So anything that touches the outside of the car will get a shock. That sounds lovely. M: It's only a tiny amount of electricity. It wouldn't be enough to shock anybody. W: Well, it sounds pretty difficult to believe. M: Yes, it's quite amazing. The important thing you have to remember is that the color of an object is really just an illusion created by the way light bounces off its surface. Engineers have been able to produce a car that changes colors at the touch of a button by slightly rearranging the position of the particles on the surface of the metal. W: It sounds so amazing. But I guess it could be possible. M: It is possible today. The only problem is that it is very expensive. To produce a car with a surface that changed colors would cost almost twice as much as what a regular car costs. For that much money you could just by the car and have it repainted twenty times, so it's not very practical yet. W: Yes, but in other ways it could be more practical. If you took your car to be painted twenty times, it would use quite a bit of polluting chemicals, and it would take a long time. M: You're right there, but how many people really get their car repainted that many time？ W: Hmm, I suppose you're right, but I sure would love to have my car match my outfit every day. (26) A．She is impressed. B．She is doubtful. C．She is shocked. D．She is surprised.

A．《荀子·劝学》 Xun Zi's Persuasion of Learning B．《老子》 Tao Te Ching C．《韩非子》 Han Feizi D．《孟子》 The Mencius

A．another B．the others C．other D．the other