单选题You should have blended the butter with the sugar thoroughly.

单选题Make sure the table is securely （anchored）.

单选题Ants always put food away in Autumn.

单选题The part-time job really takes up most of my spare time.

单选题He is a physician .

单选题Chinese people began to be aware of the seriousness of the population.

单选题And the cars are tested for {{U}}defects{{/U}} before leaving the factory. A. functions B. faults C. motions D. parts

单选题The governments of most seacoast nations print tidal tables showing the times of the tides at their main ports.A. calculateB. describeC. publishD. circulate

单选题The passage mentions all of the following factors for the existence of life EXCEPT A. the right amount of atmosphere. B. a steady supply of water. C. steady heat and light. D. the right distance from the sun.

单选题His {{U}}motive{{/U}} in coming was to find out the truth.

单选题The dogs that help in criminal investigations are trained at a school called the Military Dog Studies branch of the US Air Force in Lackland, Texas. The dogs to be trained are selected by an air force team. This team visits large cities across the country to buy dogs. They may buy dogs from private citizens for up to $ 750 each. Some citizens freely give their dogs. The dogs selected must be healthy, brave and aggressive. They must be able to fight back if they are attacked. The dogs chosen are between the ages of one and three. They are given a medical examination when they arrive at the school. Their physical examination includes X - rays and heart tests. The trainee dogs undergo the first stage of training when they arrive in Lackland. This is an 11 - week course for patrol duty. After this course, the best dogs are selected to go on another 9 - week course. They learn drug - sniffing or bomb - sniffing. After this course, the dogs are ready for their jobs in the cities or off air force bases. Dogs are ready for their jobs of drug - sniffing or bomb - sniffingA. after an 11 - week course.B. after a 9 - week course.C. after they are given medical examinationsD. after they have grown large enoug

单选题Up in Smoke I began to smoke when I was in high school. In fact, I remember the evening I was at a girlfriend's house, and we were watching a movie—a terribly romantic movie. He (the hero of the movie) was in love, she (his lady) was beautiful, and they were both smoking. My friend had only two cigarettes from a pack in her mother's purse, and she gave one to me. It was my first time. My parents didn't care much. They both smoked, and my older brother did too. My mother told me that smokers don't grow tall, but I was already5'6"(taller than most of the boys in my class), so I was happy to hear that "fact". In school, the teachers talked against smoking, but the cigarette advertisements were so exciting. The men in the ads were so good-looking and so successful, and the women were-well, they were beautiful and sophisticated(老于世故的). I read a book called how to stop smoking. The writer said that smoking wastes time, and that cigarettes cost a lot of money. "So what?" I thought, the book didn't say that smoking can take away years of your life. But ten years later, everyone began to hear about the negative effects of cigarette smoke: lung disease, cancer, and heart problems. After that, there was a health warning on every pack of cigarettes. I didn't pay much attention to the reports and warnings. I felt healthy, and I thought I was taking good care of myself. Then two events changed my mind. First, I started to cough. I thought it was just a cold, but it didn't get better. Second, my brother got lung cancer. He got sicker and sicker. My brother and I used to smoke cigarettes together over twenty years age, and we smoked our last cigarettes together the day before he died. I sat with him in his hospital room, and I decided to quit. "NO more cigarettes, ever," I said to myself. However, it was very hard to stop, Nicotine(尼古丁)is a drug; as a result, cigarettes cause a powerful addiction. I tried several times to quit on my own—without success. I made excuses. I told myself: Smoking helps me keep my figure—i.e. I don't gain weight when I smoke. Smoking not only relaxes me but it also helps me think clearly. I'm a free, liberated woman. I can smoke when I want to. Finally, I ran out of excuses—I might say my excuses went up in smoke. I joined the "Stop Smoking" program at the local hospital, which also ended up in failure.

单选题Nanotechnology Many of the grand challenges of today and the future are found in the question: "How are we going to solve the problems and make serious improvements in industrial manufacturing, disease control, environmental pollution control, global climate change, food production, transportation, communication, and others?" Nanotechnology (纳米技术) promises to make revolutionary contributions. Within the next few years we can expect to see major improvements. Here are some possibilities the things to come. Nanotechnology is fundamentally changing the way materials and devices will be produced in the future. Nanostructures, ceramics, polymers, metals, and other materials will have greatly improved mechanical properties. In fact, with the ability to build things atom-by-atom and molecule-by-molecule there will be new classes of structural materials. Nanotechnology will enable products to be lighter, stronger, smarter, cheaper, cleaner and more precise. The ability to synthesize nanoscale budding blocks with precisely controlled size and composition and then to assemble them into larger structures with unique properties and functions will revolutionize segments of the materials manufacturing industry. Nanotechnology is expected to bring about lighter, stronger, and programmable materials; reductions in life-cycle costs through lower failure rates; innovative devices based on new principles and architectures; and use of molecular cluster manufacturing. Nanotechnology will provide new tools for medicine. It could radically change the way surgery is done. It will make it possible to do molecular scale surgery to repair and rearrange cells. Since disease is the result of physical disorder, misarranged molecules and cells, medicine at this level should be able to cure most diseases. Mutations in DNA could be repaired and cancer cells, toxic chemicals, and viruses could be destroyed through use of medical Nan devices. Nanotechnology enabled increases in computational power will permit the characterization of macromolecular networks in realistic environments. Such simulations will be essential elements in the development of biocompatible implants and in the drug discovery process. Nanotechnology has the potential to significantly impact energy efficiency, storage, and production. Nanotechnology can change the economics of energy production.

单选题When a woman reaches marriageable age, she and her parents compile a packet of information about her, including a photograph of her and description of her family background, education, hobbies, accomplishments, and interests. Her parents then inquire among their friends and acquaintances to see if anyone knows a man who would be a suitable husband for her. The person who does becomes the go—between, showing the packet to the potential bridegroom and, if both parties are interested, arranging a meeting in the restaurant of a posh (高档的，豪华的) hotel. The go - between is present, usually along with representatives from both families. If the young people feel inclined, they will begin dating, with marriage as a possible but not inevitable result. It is not uncommon for a women to have 10 or more such introductions before she finds the man she wants to marry. If the mail and woman are interested in each other, they willA. begin dating.B. get married.C. go to another introduction.D. begin dating but not marry.

单选题Hearing problems may be alleviated by changes in diet and exercise habits. A. removed B. cured C. treated D. lessened

单选题The writer found it hard to quit smoking because

单选题The story was very touching . ______

单选题The book's unusual title {{U}}intrigued{{/U}} me into reading it.

单选题What did the “couch” represent?

单选题 下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。 {{B}}The Ideal Husband{{/B}} Science now might be able to explain women's fascination with Brad Pitt's face and George Clooney's eyes. Women seem to{{U}} (51) {{/U}}potential mates by how masculine their features are, new research shows. Men with square jaws and well-defined brow ridges are seen as good short-term partners,{{U}} (52) {{/U}}those with more feminine traits such as a rounder face and fuller lips are perceived as better long-term mates. In the study by Daniel Kruger at the US's University of Michigan, 854 subjects viewed a series of{{U}} (53) {{/U}}head shots that had been digitally changed to exaggerate or minimize masculine traits They then{{U}} (54) {{/U}}questions about how they expected the men in the photos to behave. Most participants said that those with more masculine features were{{U}} (55) {{/U}}to be risky, competitive, and more apt to fight, challenge bosses, cheat on spouses and put less effort into parenting. Those with more feminine{{U}} (56) {{/U}}were seen as good parents and husbands, hard workers and emotionally supportive mates. But, despite all the negative characteristics, when asked who they would choose for a short-term relationship, women selected the more masculine{{U}} (57) {{/U}}men. Brad and George, both chiseled jaws and well-defined brows, then would be good for a{{U}} (58) {{/U}}romance, not for something longer. The study was published in the December issue of the US journal Personal Relationships. Kruger said that from an evolutionary perspective, this{{U}} (59) {{/U}}sense. The key is testosterone, the hormone responsible{{U}} (60) {{/U}}the development of masculine facial features and other sexual characteristics. It has been found to affect the body's ability to fight disease: men with high levels of the hormone are typically{{U}} (61) {{/U}}and healthy-traits women want to pass on to their children. However, increased testosterone has also been linked to{{U}} (62) {{/U}}and violence in relationships. So, these men{{U}} (63) {{/U}}produce high quality offspring, but they don't always make great parents or faithful mates, Kruger says. The scientific community have{{U}} (64) {{/U}}skepticism toward physiognomy, which links facial characteristics to certain behavioural traits. But Kruger argues that the research is a valuable tool for understanding mating strategies. And, of course, for explaining why Tony Leung and Takeshi Kanesshiro have millions of female{{U}} (65) {{/U}}. It might have to do with their genes. Or something to do with ours.