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普萘洛尔在人体中有4-羟基普萘洛尔和萘氧乳酸二个主要代谢物，后者没有药理作用，前者与普萘洛尔有同样的药理作用。当普萘洛尔静脉注射时，血液中没发现4-羟基普萘洛尔，而口服时却在血中检测到几乎相同浓度的普萘洛尔和4-羟基普萘洛尔，这主要因为
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TEXT E As Dr. Samuel Johnson said in a different era about ladies preaching, the surprising thing about computers is not that they think less well than a man, but that they think at all. The early electronic computer did not have much going for it except a marvelous memory and some good math skills. But today the best models can be wired up to learn by experience, follow an argument, ask proper questions and write poetry and music. They can also carry on somewhat puzzling conversations. Computers imitate life. As computers get more complex, the imitation gets better. Finally, the line between the original and the copy be comes unclear. In another 15 years or so, we will see the computers as a new form of life. The opinion seems ridiculous because, for one thing, computers lack the drives and emotions of living creatures. But drives can be programmed into the computer’s brain just as nature programmed then into our human brain as a part of the equipment for survival. Computers match people in some roles, and when fast decisions are needed in a crisis, they often surpass them. Having evolved when the pace of life was slower, the human brain has an inherent defect that pre vents it from absorbing several streams of information simultaneously and acting on them quickly. Throw too many things at the brain at one time and it freezes up. We are still in control, but the capabilities of computers are in creasing at a fantastic rate, while raw human intelligence is changing slowly, if at all. Computer power has increased ten times every eight years since 1946. In the 1990s, when the sixth generation appears, the reasoning power of an intelligence built out of silicon will begin to match that of the human brain. That does not mean the evolution of intelligence has ended on the earth. Judging by the past, we can expect that a new species will arise out of man, surpassing his achievements as he has surpassed those of his predecessor. Only a carbon chemistry enthusiast would assume that the new species must be man’s flesh-and-blood descendants. The new kind of intelligent life is more likely to be made of silicon. What do you suppose was the attitude of Dr. Samuel Johnson towards ladies preaching
TEXT D How do we get more young people to increase their consumption of iron-rich foods Many nutritionists are advocating the fortification of a number of foods. This may help, but I contend that we should also intensify our efforts in nutrition education among our young people. I simply do not buy the argument that it is futile to try to change eating habits. Once an intelligent person—and this includes adolescents—understands the need for a healthy diet, I think he or she will act accordingly. As for specific actions, I suggest that blood hemoglobin should be checked as a routine part of a youngster’s yearly physical. It should contain at least 11 grams per 100 milliliters of blood for a girl and at least 12 grams for a boy. If it is any lower, the physician probably will prescribe an easily absorbed iron supplement. Adolescents—and everyone else—should cut out highly processed foods and drinks, which may be low in iron and other nutrients. Read the labels for iron content. Especially make sure that all bakery products are made with enriched flour or whole grains. Try adding liver, chicken, beef, veal or any other variety to the weekly menu. Finally, even when you are trying to lose weight, always eat a sensible, well-balanced diet made up of a variety of fresh or very lightly processed foods. This way, you stand a good chance of getting not only enough iron, but also adequate amounts of all the other essential nutrients. The author says that the appropriate way to lose weight is ______.
TEXT C Clothes play a critical part in the conclusions we reach by providing clues to who people are, who they are not, and who they would like to be. They tell us a good deal about the wearer’s background, personality, status, mood, and social outlook. Since clothes are such an important source of social information, we can use them to manipulate people’s impression of us. Our appearance assumes particular significance in the initial phases of interaction that is likely to occur. An elderly middle-class man or woman may be alienated by a young adult who is dressed in an unconventional manner, regardless of the person’s education, background, or interests. People tend to agree on what certain types of clothes mean. Adolescent girls can easily agree on the lifestyles of girls who wear certain out fits, including the number of boyfriends they likely have had and whetherthey smoke or drink. Newscasters, or the announcers who read the news on TV, are considered to be more convincing, honest, and competent when they are dressed conservatively. And college students who view themselves as taking an active role in their interpersonal relationships say they are concerned about the costumes they must wear to play these roles successfully. Moreover, many of us can relate instances in which the clothing we wore changed the way we felt about ourselves and how we act ed. Perhaps you have used clothing to gain confidence when you anticipated a stressful situation, such as a job interview, or a court appearance. In the workplace, men have long had well-defined precedents and role models for achieving success. It has been otherwise for women. A good many women in the business world are uncertain about tire appropriate mixture of "masculine" and "feminine" attributes they should convey by their professional clothing. The variety of clothing alternatives to women has also been greater than that available for men. Male administrators tend judge women more favorably for managerial positions when the women display less "feminine" grooming- shorter hair, moderate use of make-up, and plain tailored clothing. As one male administrator con fessed, "an attractive woman is definitely going to get a longer interview, but she won’t get a job." What is the passage mainly about
墙地砖的技术指标主要包括规格尺寸、外观质量、吸水率、急冷急热性、抗弯强度、白度和色差等。( )
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