单选题When you go to a foreign country, you must ______ yourself to new manners and customs.

单选题In no ______ should you do this without help and advice from your doctor-restricting the diet of small children can be very dangerous.

单选题 丽江古城 丽江古城(the Old Town of Lijiang)位于中国云南省丽江市，始建于南宋末年，至今已有八百多年的历史。丽江古城地处战略要地，古时候商旅活动频繁，是茶马古道(the Ancient Tea Horse Road)上的重镇。丽江古城没有城墙，古城内的建筑融合了多种文化元素，展现了汉族、白族、藏族以及纳西族的建筑特点。古城拥有古老的供水系统，至今仍有效地发挥着作用。水系(waterway)上有三百多座桥，均建于明清时期。现在，纳西族的传统文化东巴(Dongba)文化，如文字、绘画、舞蹈和音乐成为丽江古城旅游的焦点。

单选题 Now listen to the following recording and answer questions25-27.

单选题 越来越多受英文教育的海外华人父母认识到孩子在掌握不可或缺的英文的同时，通晓中文同样重要。中国的崛起让他们充分认识到孩子掌握双语的好处——既能增加他们的就业机会，也能让他们接触和熟悉东西方两种不同的文化。这些人对中文的态度几乎完全改变。曾几何时，他们还非常骄傲地宣称自己只懂英文。现在，他们已开始积极支持孩子学习中文和中国文化，而且还不时走访中国，欣赏壮观的自然风光，认识丰富的文化遗产。

单选题Her face is_________ to me, but I can’t remember where I saw her.

单选题If you get into difficulties, don"t hesitate to ______ help.

单选题The scientists have made an _______study of the virus that causes the disease.

单选题June came and the hay （干草） was almost ready for cutting. On Midsummers Eve, which was a Saturday, Mr. Jones went into Willington and got so drunk at the Red Lion that he did not come back until m

单选题Some of the plan's provisions have already aroused opposition, most notably from Pope John Paul Ⅱ.

单选题When we think about addiction to drugs or alcohol, we frequently focus on negative aspects, ignoring the pleasures that accompany drinking or drug-taking. (21) the essence of any serious addiction is a pursuit of pleasure, a search for a "high" that normal life does not (22) . It is only the inability to function (23) the addictive substance that is dismaying, the dependence of the organism upon a certain experience and a(n) (24) inability to function normally without it. Thus a person will take two or three (25) at the end of the day not merely for the pleasure drinking provides, but also because he "doesn't feel (26) " without them. (27) does not merely pursue a pleasurable experience and need to (28) it in order to function normally. He needs to repeat it again and again. Something about that particular experience makes life without it (29) complete. Other potentially pleasurable experiences axe no longer possible, (30) under the spell of the addictive experience, his life is peculiarly (31) . The addict craves an experience and yet he is never really satisfied. The organism may be (32) sated, but soon it begins to crave again. Finally a serious addiction is (33) a harmless pursuit of pleasure by its distinctly destructive elements. A heroin addict, for instance, leads a (34) life: his increasing need for heroin in increasing doses prevents him from Working, from maintaining relationships, from developing in human ways. (35) an alcoholic's life is narrowed and dehumanized by his dependence on alcohol.

单选题Most of the independent secondary schools ______.

单选题Jack: ______?Lora: I'm an engineer.Jack: Oh, are you?Lora: How about you?Jack: I work for a trading company.

单选题The piano in the other shop will be ______, but ______.

单选题The evolution of sex ratios has produced, in most plants and animals with separate sexes, approximately equal numbers of males and females. Why should this be so? Two main kinds of answers have been offered. One is couched in terms of advantage to population. It is argued that the sex ratio will evolve so as to maximize the number of meetings between individuals of the opposite sex. This is essentially a "group selection" argument. The other, and in my view correct, type of answer was first put forward by Fisher in 1930. This "genetic" argument starts from the assumption that genes can influence the relative numbers of male and female offspring produced by an individual carrying the genes. That sex ratio will be favored which maximizes the number of descendants an individual will have and hence the number of gene copies transmitted. Suppose that the population consisted mostly of females, then an individual who produced sons only would have more grandchildren. In contrast, if the population consisted mostly of males, it would pay to have daughters. If, however, the population consisted of equal numbers of males and females, sons and daughters would be equally valuable. Thus a one-to-one sex ratio is the only stable ratio; it is an "evolutionarily stable strategy." Although Fisher wrote before the mathematical theory of games had been developed, his theory incorporates the essential feature of a game that the best strategy to adopt depends on what others are doing. Since Fisher's time, it has been realized that genes can sometimes influence the chromosome or gamete in which they find themselves so that the gamete will be more likely to participate in fertilization. If such a gene occurs on a sex-determining (X or Y) chromosome, then highly aberrant sex ratios can occur. But more immediately relevant to game theory are the sex ratios in certain parasitic wasp species that have a large excess of females. In these species, fertilized eggs develop into females and unfertilized eggs into males. A female stores sperm and can determine the sex of each egg she lays by fertilizing it or leaving it unfertilized. By Fisher's argument, it should still pay a female to produce equal numbers of sons and daughters. Hamilton, noting that the eggs develop within their host—the larva of another insect—and that the newly emerged adult wasps mate immediately and disperse, offered a remarkably cogent analysis. Since only one female usually eggs in a given larva, it would pay her to produce one male only, because this one could fertilize all his sisters on emergence. Like Fisher, Hamilton looked for an evolutionarily stable strategy, but he went a step further in recognizing that he was looking for a strategy.

单选题It is usual to classify types of production as job production, batch production and flow production. In job production, products are supplied to the special requirements of a customer, and the whole project is undertaken as one operation which is completed before passing, on to the next. A good example of this kind of work is shipbuilding. In job production a single item is produced at a time, whereas in batch production a number of similar items are produced in order to meet a continuing sales demand Batch sizes vary, but the quantity which is produced amounts to more than immediate requirements, and the surplus production is stored. Finally, in flow production, the manufacture of a product proceeds from one operation to another at a planned rate of output. It is argued that the type of production method which is employed depends on the development of an individual company. That. is to say, many factories begin manufacturing on a job production basis and proceed, as the volume of production increases, to batch and flow production methods. This is not always the case, however, since the type of production is not necessarily determined by the product volume which is aimed at. In fact, in the car industry, tools are produced by jobbing methods, components are produced by batch methods, and the final product is assembled by flow methods. Flow production is associated with flow layouts, whereas job and batch production are associated with process layouts. In a process layout, machines of a similar type are grouped together in the same section of the factory, and work in progress is moved from one part of the factory to another. In a flow layout scheme, the manufacturing equipment is arranged in the same sequence as the operations performed on the product. Each of these operations must be capable of processing work at the rate required for assembly of the final product, and the output for each operation must be balanced in order to provide a smooth flow of work. There are advantages in both types of layout. In a process layout system there is more flexibility, and a greater specialization of machines and labour is possible, while in a flow layout system it is not necessary to maintain a high level of stocks or to demand great skill in the workforce.

单选题Long Conversation 1 Questions 9 to 11 are based on the conversation you have just heard. （）

单选题All visitors are requested to ______ with the regulations.

单选题Until recently most historians spoke very critically of the Industrial Revolution. They (31) that in the long run industrialization greatly raised the standard of living for the (32) man. But they insisted that its (33) results during the period from 1740 to 1840 were widespread poverty and misery for the (34) of the English population. (35) contrast, they saw in the preceding hundred years from 1640 to 1740, when England was still a (36) agricultural country, a period of great abundance and prosperity. This view, (37) is generally thought to be wrong. Specialists (38) history and economics, have (39) two things: that the period from 1640 to 1740 was (40) by great poverty, and that industrialization certainly did not worsen and may have actually improved the conditions for the majority of the populace.

单选题(There) are (thousand) of (different) types (of) roses.A. ThereB. thousandC. differentD. of