If you have not signed a contract, you are under no______to pay them any money.

A . 如果你学会理解这些姿势，你就会分辨出一个人说的是否是他真正的意思，或者他是否像那种“笑里藏刀”的人在试图蒙蔽你。 B . 如果你学会理解这些姿势，你就会分辨出一个人是否口是心非，是否像那种“笑里藏刀”的人试图蒙蔽你。 C . 如果你学会理解这些姿势，你就会分辨出一个人所说的话是否是他真正要表达的东西，是否是那种“笑里藏刀”的人试图蒙蔽你。

A . Make periodic inspections of bilges B . Keep the barge under constant surveillance C . Have a properly certificated tankerman or at least one licensed officer on board the towing vessel D . Verify ullage reading

A . Your speed must be reduced to bare steerage ways B . A look-out is not required if the radar is on C . The radar should always be kept on a short-range scale D . Fog signals are only required when a vessel is detected by radar

A . Review the contents of the boot.ini file. B . Review the contents of the setup.log file C . At the command prompt, run sigverif.exe.  D . From the Device Manager snap-in, view resources by type.&e

A . diploma B . certificate C . license D . passport

A . is B . aren’t C . isn’t D . are

Professor Taiju Matsuzawa wanted to find out why otherwise healthy farmers in northern Japan appeared to be losing their ability to think and reason at a relatively early age, and how the process of ageing could be slowed down. With a team a colleague (同事) at Tokyo National University, he set about measuring brain volumes of a thousand people of different ages and varying occupations. " Computer technology enabled the researchers to obtain precise (精确的) measurements of the volume of the front and side sections of the brain, which relate to intellect (智能) and emotion, and determine the human character. " The rear section of the brain, which controls functions like eating and breathing, does not contract with age, and one can continue living without intellectual or emotional facilities. Contraction of front and side parts—as cells die off—was observed in some subjects in their thirties, but it was still not evident in some sixty- and seventy-year-olds. Matsuzawa concluded from his tests that there is a simple remedy to the contraction normally associated with age—using the head. The findings show in general terms that contraction of the brain begins sooner in people in the country than in the towns. Those least at risk, says Matsuzawa, are lawyers, followed by university professors and doctors. White collar workers doing routine work in government offices are, however, as likely to have shrinking brains as the farm workers, bus drivers and shop assistants. Matsuzawa's findings show that thinking can prevent the brain from shrinking. Blood must circulate properly in the head to supply the fresh oxygen the brain cells need. "The best way to maintain good blood circulation is through using the brain, " he says, "Think hard and engage in conversation. Don't rely on pocket calculators. The team of doctors wanted to find out______. A．how to make people live longer B．the size of certain people's brains C．which people are most intelligent D．why certain people age sooner than others

A．word B．code C．sentence D．character

A．How long for？ B．Well, yes, actually-this is a no smoking compartment. C．I don't think I agree with you. D．When exactly？

That is because the tidiness lobby counts the benefits of neatness, but not its costs. A rough storage system (important papers close to the keyboard, the rest distributed in loosely related piles on every flat surface) takes very little time to manage. Filing every bit of paper in a precise category, with colour-coded index tabs and a neat system of cross-referencing, will certainly take longer. And by the end, it may not save any time. Your reviewer's office is easily the most untidy in The Economist (not entirely his own work, it should be said, thanks to the heroic efforts of his even untidier office-mate). But when it comes to managing information, there seems to be no discernible difference in the end result. The authors of this book trawl the furthest reaches of psychology, management studies, biology and physics to show why a bit of disorder is good for you. Chiefly, it creates much more room for coincidence and serendipity. Alexander Fleming discovered penicillin because he was notoriously untidy, and didn't clean a Petri dish, thus allowing fungal spores to get to work on bacteria. He remarked wryly on visiting a colleague's spotless lab: "no danger of mould here". It can also help make sense of things. Hearing depends on random movement of molecules: when they coincide with sounds from outside, they are strong enough to stimulate the inner ear. A bit of background noise on the phone enables our ears to filter out echoes. A slightly mushy photograph can be easier to understand. Music and art depend on mess. Procrastination makes sense too. America’s Marine Corps, the authors repeat (several times), never makes detailed plans in advance. Leaving important things to the last minute reduces the risk of wasting time on things that may ultimately prove not important at all. The authors are witheringly contemptuous of the bogus equation of tidiness and morality—for example in corporate "clean desk" policies. Disorder and creativity are so closely linked that any employer who penalizes the first sacrifices the second, they argue. America's professional organizers, a thriving and lucrative cult of tidiness coaches, are merchants of guilt, not productivity boosters. It's all fine, up to a point. But the book has two weaknesses. One is that it overstates the case. The case for tidiness in some environments—surgery, a dinner table or income tax returns—is really overwhelming. The other is that the book is a bit repetitive and disorganized. Even readers who love mess in their own lives don't necessarily like it in others. Paraphrase the sentence "the tidiness lobby counts the benefits of neatness, but not its costs". (para. 2)

A．romantic B．realistic C．optimistic D．fantastic