单选题As a salesman, he works on a ______ basis, taking 10% of everything he sells. A. revenue B. commission C. salary D. pension

单选题The reason why the 55-year-old Hispanic woman became a florist is that ______.

单选题The author's comment may best be interpreted as______.

单选题While typing, Helen has a habit of stopping ______ to give her long and flowing hair a smooth.

单选题(Provided) the computer is (given) correct information (to start), accuracy (is) another outstanding advantage.

单选题As the ship is loaded, it will sink deeper and deeper into the water, but only sink deep enough to ______ an amount of water equal to the weight of the ship and its cargo. A. dismiss B. offset C. displace D. squeeze

单选题After a year's hard work I think I am ______ to a long holiday. A. entailed B. deserved C. entitled D. satisfied

单选题A particular area in which assumptions and values differ between cultures is that of friendship. Friendships among Americans tend to be shorter and less intense than those among people from many other cultures. At least many observers from abroad have this impression. Because Americans are taught to be self-reliant, because they live in a very mobile society, and for many other reasons as well, they tend to avoid deep involvement with other people. Furthermore, Americans tend to "compartmentalize" their friendships, having their "friends at work" , "friends at school" , a "tennis friend" , and so on. Americans often seem very friendly, even when you first meet them. This friendliness does not usually mean that the American is looking for a deeper relationship. The result of these attitudes and behaviors is sometimes viewed by foreigner as an "inability to be friends". Other times it is seen as a normal way to retain personal happiness in a mobile, ever-changing society. People normally have in their minds stereotypes about people who are different from themselves. Stereotypes are based on limited and incomplete experience and information, but they shape people's thoughts and expectations. Americans have many stereotypes about foreign students in general(for example, that they are very hard working, intelligent, and rich; that they do not speak English well)and about particular categories of foreign students(Chinese are polite and good at mathematics, for example, or Italians are emotional). And foreign students have their own stereotypes of Americans, for example, that they are arrogant, rude, and generous. There are two stereotypes that often effect male-female relationships involving U. S. and foreign students. The first is the idea, held by some foreign males, that American females are invariably willing, if not anxious, to have sex. The second common stereotype, held by some American females, is that male foreign students have no interest in American females other than having sex with them. The existence of these and other stereotypes can give rise to considerable misunderstanding and can block the development of a mutually satisfactory relationship between particular individuals. Stereotypes seem unavoidable, given the way the human mind seeks to categorize and classify information, so it is not realistic to suppose people can "forget their stereotypes". But they can be aware of their stereotypes, and be ready to find exceptions to them.

单选题They achieved more than they had ever dreamed, lending a magic to their family story that no tale or ordinary life could possibly rival.

单选题The students take a ______ test in March, and the main exam is July.(2004年西南财经大学考博试题)

单选题There has been an increase in attendance at lectures______by the World Affairs Council, which brings international issues to public attention.

单选题Scientists have discovered a close ______ between smoking and several serious diseases. A. action B. connection C. union D. combination

单选题Very soon, unimaginably powerful technologies will remake our lives. This could have dangerous consequences, especially because we may not even understand the basic science underlying them. There"s a growing gap between our technological capability and our underlying scientific understanding. We can do very clever things with the technology of the future without necessarily understanding some of the science underneath, and that is very dangerous. The technologies that are particularly dangerous over the next hundred years are nanotechnology, artificial intelligence and biotechnology. The benefits they will bring are beyond doubt but they are potentially very dangerous. In the field of artificial intelligence there are prototype designs for something that might be 50,000 million times smarter than the human brain by the year 2010. The only thing not feasible in the film Terminator is that the people win. If you"re fighting against technology that is that much smarter than you, you probably will not win. We"ve all heard of the grey goo problem that self-replicating nanotech devices might keep on replicating until the world has been reduced to sticky goo, and certainly in biotechnology, we"ve really got a big problem because it"s converging with nanotechnology. Once you start mixing nanotech with organisms and you start feeding nanotech—enabled bacteria, we can go much further than the Borg in Star Trek , and those superhuman organisms might not like US very much. We are in a world now where science and commerce are increasingly bedfellows. The development of technology is happening in the context of global free trade regimes which see technological diffusion embedded with commerce as intrinsically a good. We should prepare for new and unfamiliar forms of argument around emerging technologies.

单选题The taller the container, ______ at the bottom. A. the greater will the water pressure be B. the water pressure will be greater C. the greater will be the water pressure D. greater the water pressure will be

单选题His new theory has caused an enormous ______ throughout the civilized world. A. solidarity B. sentiment C. sermon D. sensation

单选题We must try to use our intellect ______.

单选题I'd just do as soon as you ______ the research yourself. A. do B. will do C. would do D. did

单选题We spent the day ______ through forests and over mountains.