单选题Woman: Do you like the course we're taking? Man: It's beyond me. Question: What does the man mean? A. He doesn't want to answer the question. B. He doesn't like the course. C. He can't understand the course. D. He feels comfortable with the course.

单选题Today Americans have different eating habits than in the past. There is a wide selection of food available. They have a broader knowledge of nutrition, so they buy more fresh fruit and vegetables than ever before. At the same time, Americans purchase increasing quantities of sweets, snacks and sodas. Statistics show that the way people live determines the way they eat. American life styles have changed. They now include growing numbers of people who live alone, single parents and children, and double-income families. These changing life styles are responsible for the increasing number of people who must rush meals or sometimes skip them altogether. Many Americans have less time than ever before t9 spend preparing food. Partly as a consequence of this limited time, 60 percent of all American homes now have microwave ovens. Moreover, Americans eat out nearly four times a week on the average. It is easy to study the amounts and kinds of food that people consume. The United States Department of Agriculture (USDA) and the food industry-growers, processors, marketers and restaurant managers compile sales statistics and keep accurate records. This information not only tells us what people are eating but also tells us about the changes in attitudes and tastes. Red meat, which used to be the most popular choice for dinner, is no longer an American favorite. Instead, chickens, turkey, and fish have become more popular. Sales of these foods have greatly increased in recent years. This is probably a result of the awareness of the dangers of eating food which contains high levels of cholesterol, or animal fat. Doctors believe that cholesterol is a threat to human health. According to a recent survey, Americans also change their eating patterns to meet the needs of different situations. They have certain ideas about which foods will increase their athletic ability, help them lose weight, make them alert for business meetings, or put them in the mood for romance. For example, Americans choose pasta, fruit, and vegetables, which supply them with carbohydrates, to give them strength for physical activity, such as sports. Adults choose food rich in fiber, such as bread and cereal, for breakfast, and salads for lunch to prepare them for business appointment. For romantic dinners, however, Americans choose shrimp and lobster. While many of these ideas are based on nutritional facts, some are not. Americans" awareness of nutrition, along with their changing tastes and needs, leads them to consume a wide variety of foods—foods for health, for fun, and simply for good taste.

单选题Aluminum is found on earth mostly in the form of ______.

单选题{{B}}Passage 2{{/B}} While hackers with motives make headlines, they represent less than 20% of all net- work security breaches. More common are instances of authorized users accidentally winding up where they should not be and inadvertently deleting or changing data. However, the Internet introduces another concern: some Internet surfers are bound to go where they have no business and, in so doing, threaten to wipe out data to which they should not have access. Before picking a firewall, companies need to adopt security policies. A security policy states who or what is allowed to connect to whom or what. You can group all users by department or classification. The better firewall products let you drag and drop groups in a graphical user interface (GUI) environment to define network security easily. Two methods are most often used together to establish an Internet firewall. They are application and circuit gateways, as well as packet filtering. With application and circuit gateways, all packets are addressed to a user-level application on a gate-way that relays packets between two points. With most application gateways, additional packet-filter machines are required to control and screen traffic between the gateway and the networks. A typical configuration includes two routers. With a bastion host that serves as the application gateway sitting between them. A drawback to application and circuit gateways is that they slow network performance. This is because each packet must be copied and processed at least twice by all the communication layers. Packet-filter gateways, which act as routers between two nets, are less secure than application gateways but more efficient. They are transparent to many protocols and applications, and they require no changes in client applications, no specific application management or installation, and no extra hardware. Using a single, unified packet-filter engine, all net traffic is processed and then for- warded or blocked from a single point of control. However, most packet filters are state- less, understand only low-level protocols, and are difficult to configure and verity. In addition, they lack audit mechanisms. Some packet filters are implemented inside routers, limiting computing power and filtering capabilities. Others are implemented as s9ftware packages that filter the packets in application-layer processes, an inefficient approach that requires multiple data copies, expensive delays and context switches and delivers lower throughput. So what's a network administrator to do? Some vendors are developing firewalls that overcome many of these problems and combine the advantages of application gateways and packet filtering. These efficient, protocol-independent, secure firewall engines are capable of application-level security, user authentication, unified support, and handling of all protocols, auditing and altering. They are transparent to users and to system setup, and include a GUI for simple and flexible system management and configuration.

单选题Word came ______ she died of old age.A. thatB. whichC. in whichD. how

单选题New technology links the world as never before. Our planet has shrunk. It's a new "global village" where countries are only seconds away by fax or phone or satellite link. And, of course, our ability to benefit from this high-tech communications equipment is greatly enhanced by foreign language skills. Deeply involved with this new technology is a breed of modem businesspeople who have a growing respect for the economic value of doing business abroad. In modem markets, success overseas often helps support domestic business efforts. Overseas assignments are becoming increasingly important to advancement within executive ranks. The executive stationed in another country no longer needs fear being "out of sight and out of mind". He or she can be sure that the overseas effort is central to the company's plan for success, and that promotions often follow or accompany an assignment abroad, if an employee can succeed in a difficult assignment overseas, superiors will have greater confidence in his or her ability to come back in the United States where cross-cultural considerations and foreign language issues are becoming more and prevalent (普遍的) . Thanks to a variety of relatively inexpensive communications devices with business applications, even small businesses in the United States are able to get into international markets. English is still the international language of business. But there is an ever-growing need for people who can speak another language. A second language isn't generally required to get a job in business, but having language skills gives a candidate the edge when other qualifications appear to be equal. The employee posted abroad who speaks the country's principal language has an opportunity to fist-forward certain negotiations, and can have the cultural insight to know when it is better to move more slowly. The employee at the home office who can communicate well with foreign clients over the telephone or by fax machine is an obvious asset to the firm.

单选题It is high time that you______the problem carefully about what you will do in the future.

单选题We are living in an age______many things are done on the computer.

单选题An opaque material is ______.

单选题I'm sorry to have ______ you waiting for a long time. A. kept B. made C. got D. let

单选题Auctions are public sales of goods, conducted by an officially approved auctioneer. He asks the crowd assembled in the auction room to make offers, or "bids", for the various items on sale. He encourages buyers to bid higher figures, and finally names the highest bidder as the buyer of the goods. This is called "knocking down" the goods, for the bidding ends when the auctioneer bangs a small hammer on a table at which he stands. This is often set on a raised platform called a rostrum. The ancient Romans probably invented sales by auction, and the English word comes from the Latin auctio, meaning "increase". The Romans usually sold in this way the spoils taken in war; these sales were called sub basra, meaning "under the spear", a spear being stuck in the ground as a signal for a crowd to gather. In England in the eighteenth and nineteenth centuries goods were often sold "by the candle", a short candle was lit by the auctioneer, and bids could be made while it stayed alight. Practically all goods whose qualities vary are sold by auction. Among these are coffee, hides, skins, wool, tea, cocoa, furs, spices, fruit and vegetables and wines. Auction sales are also usual for land and property, antique furniture, pictures, rare books, old china and similar works of art. The auction rooms at Christie's and Sotheby's in London and New York are world-famous. An auction is usually advertised beforehand with full particulars of the articles to be sold and where and when they can be viewed by prospective buyers. If the advertisement cannot give full details, catalogues are printed, and each group of goods to be sold together, called a "lot", is usually given a number. The auctioneer need not begin with Lot 1 and continue in numerical order, he may wait until he registers the fact that certain dealers are in the room and then produce the lots they are likely to be interested in. The auctioneer's services are paid for in the form of a percentage of the price the goods are sold for. The auctioneer therefore has a direct interest in pushing up the bidding as high as possible. The auctioneer must know fairly accurately the current market values of the goods he is selling, and he should be acquainted with regular buyers of such goods. He will not waste time by starting the bidding too low. He will also play on the rivalries among his buyers and succeed in getting a high price by encouraging two business competitors to bid against each other. It is largely on his advice that a seller will fix a "reserve" price, that is, a price below which the goods cannot be sold. Even the best auctioneers, however, find it difficult to stop a "knockout", whereby dealers illegally arrange beforehand not to bid against each other, but nominate one of themselves as the only bidder, in the hope of buying goods at extremely low prices. If such a "knockout" comes off, the real auction sale takes place privately afterwards among the dealers.

单选题What does "S. P. Q. R" suggest according to the text?

单选题Of all the areas of learning the most important is the development of attitudes.. emotional reactions as well as logical thought processes affect the behavior of most people. "The burnt child fears the fire" is one instance; another is the rise of despots like Hitler. Both these examples also point up the fact that attitudes come from experience. In the one case the experience was direct and impressive; in the other it was indirect and cumulative. The Nazis were influenced largely by the speeches they heard and the books they read. The classroom teacher in the elementary school is in a strategic position to influence attitudes. This is true partly because children acquire attitudes from those adults whose words are highly regarded by them. Another reason it is true is that pupils often devote their time to a subject in school that has only been touched upon at home or has possibly never occurred to them before. To a child who had previously acquired little knowledge of Mexico his teacher's method of handling such a unit would greatly affect his attitude toward Mexicans. The media through which the teacher can develop wholesome attitudes are innumerable. Social studies (with special reference to races, creeds and nationalities), science matters of health and safety, the very atmosphere of the classroom... these are a few of the fertile fields for the inculcation of proper emotional reactions. However, when children go to school with undesirable attitudes, it is unwise for the teacher to attempt to change their feelings by cajoling or scolding them. She can achieve the proper effect by helping them obtain constructive experiences. To illustrate, first-grade pupils afraid of policemen will probably alter their attitudes after a classroom chat with the neighborhood officer in which he explains how he protects them. In the same way, a class of older children can develop attitudes through discussion, research, outside reading and all-day trips. Finally, a teacher must constantly evaluate her own attitudes, because her influence can be negative if she has personal prejudices. This is especially true in respect to controversial issues and questions on which children should be encouraged to reach their own decision as a result of objective analysis of all the facts.

单选题His prose, while less______than some critics have maintained has no new note in it.

单选题{{B}} DirectiOns : For each blank in the following passage, choose the best answer from the choices givenbelow. Mark your answer on the ANSWER SHEET by drawing with a pencil a short bar acrossthe corresponding letter in the brackets.{{/B}} The first and smallest unit that can be discussed in relation to language is the word. In speaking,the choice of words is{{U}} 31 {{/U}}the utmost importance. Proper selection will eliminate one source of{{U}} 32 {{/U}}breakdown in the communication cycle. Too often, careless use of words{{U}} 33 {{/U}}a meeting of the mindsof the speaker and listener. The words used by the speaker may{{U}} 34 {{/U}}unfavorable reactions in thelistener{{U}} 35 {{/U}}interfere with his comprehension; hence, the transmission-reception system breaksdown.{{U}} 36 {{/U}}, inaccurate or indefinite words may make{{U}} 37 {{/U}}difficult for thelistener to understandthe{{U}} 38 {{/U}}which is being transmitted to him. The speaker who does not have specific words in hisworking vocabulary may be{{U}} 39 {{/U}}to explain or describe in a{{U}} 40 {{/U}}that can be understood by hislisteners.