单选题The first men to study the nature of electricity could not imagine that their experiments, carried on because of mere intellectual curiosity, would eventually lead to modern electrical technology, without which we can scarcely______contemporary life.

单选题A: We came so close, really. We almost won that game! B. ______ A. There, there. B. There's no use crying over spilt milk. C. You guys were superb. D. I couldn't care less.

单选题This brand of products is ______ to that in quality. A. senior B. junior C. superior D. better

单选题I remember ______ the piano beautifully when he was a child. A. playing B. him to play C. him to have played D. him playing

单选题I would gladly lend you the money, but I really ______. A. couldn't have it B. didn't have it C. shouldn't have it D. don't have it

单选题If you want to buy this house, the payment may be made in five ______. A. installments B. pieces C. shares D. parts

单选题In his example the author tells his readers that ______. ( )

单选题Whichofthefollowingstatementsiscorrectaccordingtochepassage?

单选题According to the author, the function of the structured-inquiry method is

单选题{{B}}Passage Three{{/B}} Science is a dominant theme in our culture. Since it touches almost every facet of our life, educated people need at least some acquaintance with its structure and operation. They should also have an understanding of the subculture in which scientists live and the kinds of people they are. An understanding of general characteristics of science as well as specific scientific concepts is easier to attain if one knows something about the things that excite and frustrate the scientist. This book is written for the intelligent student or lay person whose acquaintance with science is superficial; for the person who has been presented with science as a musty storehouse of dried facts; for the person who has been presented with science as the production of gadgets; and for the person who views the scientists as some sort of magician. The book can be used to supplement a course in any science, to accompany any course that attempts to give an understanding of the modern world, or--independently of any course-simply to provide a better understanding of science. We hope this book will lead readers to a broader perspective on scientific attitudes and a more realistic view of what science is who scientists are, and what they do. It will give them an awareness and understanding of the relationship between science and our culture and an appreciation of the roles science may play in our culture. In addition, readers may learn to appreciate the relationship between scientific views and some of the values and philosophies that are pervasive in our culture. We have tried to present in this book an accurate and up-to-date picture of the scientific community and the people who populate it. That population has in recent years come to comprise more and more women. This increasing role of women in the scientific subculture is not a unique incident but, rather, part of the trend evident in all segments of society as more women enter traditionally male-dominated fields and make significant contributions. In discussing these changes and contributions, however, we are faced with a language that is implicitly sexist, one that uses male nouns or pronouns in referring to unspecified individuals. To offset this built-in bias, we have adopted the policy of using plural nouns and pronouns whenever possible and, when absolutely necessary, alternating he and she. This policy is far from being ideal, but it is at least an acknowledgment of the inadequacy of our language in treating half of the human equally. We have also tried to make the book entertaining as well as informative. Our approach is usually informal. We feel, as do many other scientists, that we shouldn't take ourselves too seriously. As the reader may observe, we see science as a delightful pastime rather than as a grim and dreary way to earn a living.

单选题Cancer is considered a modem disease, though it was not unknown in ancient times. (The condition was named by the Greeks from their word for crab, presumably because of its clawing, crablike growth). The incidence of cancer has risen dramatically in recent decades, primarily 1 cigarette smoking, and cancer is probably our most dreaded disease today. As a cause of death in the United States, cancer has climbed from less than 6 percent of all deaths in 1900 to over 20 percent today, 2 recent statistics. It is already the leading killer of women aged thirty to fifty-four. And add a killer of the overall population, it is second only to heart disease, 3 close to 430,000 deaths per year. This figure has risen annually since 1949, and if percent trends continue, cancer may well overtake heart disease as the number one cause of death. Can We Fight Cancer More Effectively Today? Although there is still much to be learned about cancer, our knowledge of the disease has grown steadily in recent years. We have a better understanding of the disease and are finding ways to 4 it. Early recognition of the signs of cancer, prompt diagnosis, and aggressive treatment by the appropriate means have made the word cancer less 5 than it used to be. Even people with forms of cancer that are still difficult to treat know that current techniques may 6 them to outwit the disease until improved treatment becomes available. Many cancer victims have hope where there was once despair. Even more important is the fact that some kinds of cancer are 7 caused by preventable factors—for example, 25 to 30 percent of all cancer deaths are related to cigarette smoking, and most skin cancer is caused by 8 exposure to the sun. Not all forms of cancer have such obvious associations, but where risk factors have been 9 , we can use this knowledge and attempt to reduce the odds of developing those particular forms of disease. You and the people you know can 10 your cancer risk as individuals.

单选题(No wonder) that (man's) great dream has been someday to control the weather. The first step toward control is knowledge, and scientists have been (hard at work) for years trying to (keep track for) the weather.A. No wonderB. man'sC. hard at workD. keep track for

单选题Come and have dinner with us this evening, ______?

单选题Speaker A: I wonder if Ann will come. It' s 8:30 now and she was supposed to come at 8: 00. Speaker B:______A. She assured me she would start at 7: 30. Maybe she had been held up by the traffic.B. You shouldn' t be wondering. I believe she won' t come.C. Don' t worry. Let ' s wait here until she comes.D. Yes. I do agree with you.

单选题The heart is ______ intelligent than the stomach, for they are both controlled by the brain. A. not so B. not much C. no more D. much less

单选题My bike is missing. I cant find ______ anywhere． A．one B．ones C．it D．that

单选题As a teenager,I was_____by a blind passion for a slim star I would never meet in my life.