题目

我国于1986年2月1日成功发射了一颗地球同步卫星，于1999年12月20日又成功发射了“神舟号”试验飞船，飞船的太空中飞行了21h，环绕地球运动了14圈，又顺利返回地面，假设卫星和飞船都做匀速圆周运动，那么卫星与飞船在各自轨道上运行时①卫星运行周期比飞船大          ②卫星运动速度比飞船大③卫星运动的加速度比飞船大      ④卫星离地面高度比飞船大A．①②           B．①④           C．②③           D．③④  A characteristic of American culture that has become almost a tradition is to respect the self-made man — the man who has risen to the top through his own efforts, usually beginning by working with his hands. While the leader in business or industry or the college professor occupies a higher social position and commands greater respect in the community than the common laborer or even the skilled factory worker, he may take pains to point out that his father started life in America as a farmer or laborer of some sort.        This attitude toward manual(体力的) labor is now still seen in many aspects of American life. One is invited to dinner at a home that is not only comfortably but even luxuriously (豪华地) furnished and in which there is every evidence of the fact that the family has been able to afford foreign travel, expensive hobbies, and college education for the children; yet the hostess probably will cook the dinner herself, will serve it herself and will wash dishes afterward, furthermore the dinner will not consist merely of something quickly and easily assembled from contents of various cans and a cake or a pie bought at the nearby bakery. On the contrary, the hostess usually takes pride in careful preparation of special dishes. A professional man may talk about washing the car, digging in his flowerbeds, painting the house. His wife may even help with these things, just as he often helps her with the dishwashing. The son who is away at college may wait on table and wash dishes for his living, or during the summer he may work with a construction gang on a highway in order to pay for his education.  1. From paragraph 1, we can know that in America _________. A. people tend to have a high opinion of the self-made man B. people can always rise to the top through their won efforts C. college professors win great respect from common workers C. people feel painful to mention their fathers as labors. 2. According to the passage, the hostess cooks dinner herself mainly because _________. A. servants in American are hard to get B. she takes pride in what she can do herself C. she can hardly afford servants D. It is easy to prepare a meal with canned food 3. The expression “ wait on table” in the second paragraph means “_________”. A. work in a furniture shop                 B. keep accounts for a bar C. wait to lay the table                        D. serve customers in a restaurant 4. Which of the following may serve as the best title of the passage? A. A Respectable Self-made Family             B. American Attitude toward Manual Labor C. Characteristics of American Culture        D. The Development of Manual Labor