单选题Stagecoaches reached their greatest importance in the United Slates in the nineteenth century, when paved roads made travel —-~.

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单选题Losing Weight Student A: Do I ever ______! I couldn"t believe the scales when I ______ this morning. I weigh 10 kilos more than I did last year. I am not sure it is because I eat fast food at the university cafeteria all the time or if it is because I ______ the swim club. All my clothes are too tight. Student B: I have ______ myself since starting university. But, I think we are too young to diet. Exercise is the key. I am going to the gym three times a week. I started two weeks ago and ______. Student A: I think you have to eat the right food and exercise. The Atkins diet really controls what you eat, but my parents ______. I"m thinking about going on it. Student B: No, I disagree. You can eat whatever you want ______. Exercise burns calories. If you exercise more, you lose weight. It is that simple. Student A: Yes, you lose weight, but eating junk food and fast food like I have been doing is also not good for the heart. ______. Sugar is also very bad. I have noticed it ______. The trouble is, it ______ to diet. l just love chocolate. I could eat chocolate bars all day long, but the energy they give me ______. I wish I could diet. I started watching ______ after I gained the first five kilos, but instead of losing that 5 kilos I gained another five. My ______ I got my mother to stop sending me care packages of cookies from home, but my friends ______ still get them, and they share, so I am still eating way too many sweets. Student B: Just exercise more. Almost all the people at the gym are slim and look fit. Student A: Yes, but just because they are slim, does not mean they are fit. It is important what you put into your body. I read you should have ______ of fruit and vegetables a day to stay healthy. Also, it is important to eat a lot of fish. We need to start thinking about when we get older. My grandmother has osteoporosis, ______, and her doctor said it was because she didn"t get enough calcium when she was young. Student B: You worry too much. We are young. Maybe I will start to worry more after I"m in my thirties, right now I"m going to eat what I enjoy and exercise. Exercise is the most important thing for the heart. Student A: Maybe, but the right food is also important for the heart and ______. Student B: I like sport drinks for energy. I also get energy bars that taste like chocolate. And, I take a ______ every day. Having enough iron in your body is especially important for women like you. Supplements are not expensive, and they give you what you need. It"s a lot quicker and easier to take a supplement than ______. Student A: I am not so sure about supplements being useful. Often, they just pass through your body. It is much better to get your nutrition from eating the right foods. I understand ______, you need a little more fat, but just going to work out in the gym three times a week does not ______, Paul. I don"t think you really look that much overweight, but I think you should ______. Student B: Yea, yea, you sound like my mother. Student A: As I said, diets are very ______, but sometimes ______ and set up a proper diet. I have an appointment next week with the college dietician—he will ______ and tell me what to have for breakfast, lunch and dinner seven days a week. I don"t think I will ______ it for breakfast and lunch, but mid-afternoon I just ______. Also, I like to eat before I go to bed, which I know ______ ...Nonetheless, I am ______ these extra 10 kilos in six months.

单选题According to the passage, the white color of the smoke particles generated by a flashbulb contributes to

单选题....... widely used in the chemical industry, sodium carbonate is principally consumed by the glass industry. (a)Despite (b)Whether (c)Though (d)Except for

单选题In the 1930s, the Great Plains of North America came to be called the Dust Bowl after several large dust storms destroyed the region. The Dust Bowl was the result of human activity and bad weather that led to soil erosion. In the previous decade, farmers had plowed millions of acres of grassland to make room for growing wheat. Consequently, when a period of dry weather struck the region, there were no native grasses to hold the soil in place. The wind lifted the dry soil and carried it away in great clouds. The Dust Bowl was an ecological and economic disaster, resulting in severe soil loss, crop failures, and economic hardship.

单选题. It took more than fourteen years to carve the faces of four United States A B C Presidents into the granite cliffs to Mount Rushmore, South Dakota. D

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单选题The spice cinnamon and the drugs cascara and quinine all come from bark, the protective out layer of stems and roots of woody plants.

单选题Directions: Complete the table by matching the phrases below. Select the appropriate phrases from the answer choices and match them to the type of organism to which they relate. TWO of the answer choices will not be used. This question is worth 4 points./r/n /r/n People who are familiar with a foreign culture /r/n People who suffer from culture shock /r/n /r/n /r/n ●/r/n ●/r/n /r/n /r/n ●/r/n ●/r/n /r/n /r/n ●/r/n ●/r/n /r/n /r/n /r/n ●/r/n Answer ChoicesA. Criticize and joke about people around at the same time.B. Take a superior attitude towards the host country.C. Adopt a hostile and aggressive attitude towards the host country.D. Reject the environment which causes discomfort.E. Exert their sense of humor.F. Are easily angry with minor frustrations.G. Are indifferent to all troubles in the host country.H. Crack jokes about their own difficulties.I. Fear physical contact with attendants.

单选题Of all the elements in the Earth's crust, oxygen is known to be the morecommon.

单选题The giant ragweed, or buffalo weed, grows ---.

单选题Listentopartofalectureinahealthclass.Nowgetreadytoanswerthequestions.Youmayuseyournotestohelpyouanswer.

单选题Whatisthetalkmainlyabout?A.Thestudent'stuitionfee.B.Thestudent'splanofstudy.C.Thestudent'sassistantship.D.Thestudent'sinsurance.

单选题As a customer service representative, Mrs. Lee tried to solve complaints from customers before asking for ______ supervisors advice.

单选题Two good ways to prevent attacks of hay fever are to effect a change of climate also to eliminate harmful substances from the environment. B C D

单选题1 Most matter exists as compounds---combinations of atoms or oppositely charged ions of two or more different elements held together in fixed proportions by chemical bonds. Compounds are classified as organic or inorganic. Organic compounds contain atoms of the element carbon, usually combined with itself and with atoms of one or more other elements such as hydrogen, oxygen, nitrogen, sulfur, phosphorus, and chlorine. Many materials important to us--food, vitamins, blood, skin, cotton, wool, paper, oil, plastics--are organic compounds. 2 Larger and more complex organic compounds, called polymers, consist of a number of basic structural units linked together by chemical bonds. Important organic polymers include carbohydrates, proteins, and nucleic acids. Carbohydrates, such as the complex starches in rice and potato plants, are composed of a number of simple sugar molecules. Proteins are produced in plant and animal cells by the linking of different numbers and sequences of about twenty different structural units known as amino acids. Most animals, including humans, can manufacture about ten of these amino acids in their cells, but the other ten, called essential amino acids, must be obtained from food in order to prevent protein deficiency. Nucleic acids are composed of hundreds to thousands of four different units called nucleotides linked together in different numbers and sequences. DNA and RNA in plant and animal cells are nucleic acids.

单选题In a typical business conference, associates meet to discuss policy or to solve problems. The average participants do not do much specific preparing; their background and thinking usually formulate their contribution. But it is best if all participants know in advance the purpose of the conference. Some general preparation may be in order, and participants may want to take into the conference materials or data that might be useful if a matter comes up. 1. Which sentence below best expresses the essential information in the highlighted sentence in the passage?