单选题Mother Knows Best? Once while being prepped (准备) for a television interview, I was chatting with the host about stay-at-home fathers. I made the point that one reason we're seeing more stay-at-home dads may be that it's no longer a given (假定的事实) that a man makes more money than his wife. Many families now take earning power into account when deciding which parent will stay home. At that point, one of the male crew members commented, almost to himself but loud enough for my benefit, "It should be the better parent who stays home. " A lot of guys say things like that. Usually it's a code for, "My wife, (read: any woman) is the better parent. " I was a stay-at-home father for eight years, so this declaration made me bristle (激动). It implied that our family's choice could only have been correct if I was a "better" parent than my wife. I suppose an argument could have been made that when I began staying home my wife was the "better" parent: She had spent more time with Roy, could read him better and calm him more quickly. And given a choice, he'd have picked her over me. But as she was the more employable one. my wife went out to work and I looked after our son. Because of the increased time I spent with him, I soon knew Roy well, understood what he needed and could look after him more or less as well as my wife could. Actually, the experience helped me unlock one of the world's great secrets : Women are good at looking after children because they do it. It's not because of any innate (先天的) female aptitude (天资) or a mother's instinct, it's because they put in the time and attention required to become good at the job. Women obviously get a biological head start from giving birth and nursing, but over the long term experience is more important. When I got the experience myself, I was good, too. As good? I don't know. Who cares? Children are not made of glass. Other people are capable of looking after them besides Mum.

单选题The majority of people around here are decent people.

单选题Factors Influencing Marriage The common view in social science of love relationships is not that opposites attract each other but that like attracts like. People fall in love with others who share their interests and tastes and whose personalities are similar. Hill, Rubin, and Peplau found only slight support for this view. On a great many characteristics, couples were not alike. On others, couples were only somewhat alike. Couples did tend to be about the same age, to be equally good-looking, to have similar IQ scores, to be of the same religion , and to want the same number of children. But on each of these things, quite a few couples differed from one another. In fact, on only one question did most agree on. whether they were "in love". The early interviews failed to find that being alike was very important in bringing couples together. The follow-up interviews found that similarities were much more important in keeping couples together. Those who were together after two years were much more closely matched than couples who broke up, especially in terms of age, IQ, college plans, and looks. Thus, couples were much more likely to break up if one person was a lot smarter, better looking, or older. It is easy to imagine why these differences would matter. If one person is much smarter or more mature than the other, this could cause conflicts. If one person is much better looking, he or she will have more chances for other relationships. Yet other things that would seem as important turned out not to matter. Those who stayed together differed not at all from those who broke up in how alike they were on religion, sex role ideas, beliefs about sex, idealism, or the number of children they wanted. Surely, one might suppose that marked differences in sex role attitudes could cause friction or that religious differences might lead to breakups. But there was no evidence of this. In fact, conflict was not one of the main reasons people gave for breaking up. Most said they broke up because they got bored with the other person. Often this caused one of the pair to become interested in someone else, thus prompting (促进) the split (分裂). Perhaps surprisingly, the woman got involved with someone else far more often than the man. Also, women were much more likely to suggest a breakup than men, regardless of the grounds. However, people were more likely to remain friends after the breakup if the man asked for the split. This suggests that the male ego is more sensitive to rejection.

单选题Cost as a Factor in Supply In a purely competitive market, the supplier of goods and services has no control over the market price, because he produces too little to influence market conditions. With no difference between his products and the products (51) his competitors, he will sell nothing if he charges above the market price and he will sell all if he charges at or (52) the market price. However, in considering the price, he must take the (53) of production into consideration. There are times when he may be willing to sell below his cost. This might happen when prices tumble for (54) he believes will be a short time. However, no business person can (55) to lose money for a prolonged period. He must be constantly (56) of his costs in relation to the market price if he is to compete successfully and earn a profit. Many people have the impression that as production increases, costs per unit decrease. (57) mass production has made this true in certain industries and at certain levels of production, (58) logic and practical experiences have shown that costs per unit begin to rise beyond a certain level of production. Some economists (59) to this principle as the law of increasing costs. The reason costs rise as production goes up is (60) . However, it is easy to recognize that as production goes up, the need for additional factors of production will also grow, (61) competitive bidding in the marketplace for the factors of production. If a producer needs (62) skilled labor to produce more, and none of this labor is unemployed, the producer will have to get (63) from other sources. This can be done by (64) higher wages. Higher bidding would also apply to the other factors of production. We must also recognize that not all labor is equally productive, (65) not all land is equally fertile and not all ore (矿石) is equally rich in the mineral wanted.

单选题Reading the job ad, he wondered whether he was {{U}}eligible{{/U}} to apply for it. A. competitive B. diligent C. qualified D. equal

单选题 第三篇 High Blood Pressure There is evidence that the usual variety of high blood pressure is, in part, a familial disease. Since families have similar genes as well as similar environment, familial diseases could be due to shared genetic influences, to shared environmental factors, or to both. For some years, the role of one environmental factor commonly shared by families, namely dietary salt, has been studied at Brook-haven National Laboratory. These studies suggest that chronic excess salt ingestion (摄取) can lead to high blood pressure in man and animals. Some individuals, however, and some rats consume large amounts of salt without developing high blood pressure. No matter how strictly all environmental factors were controlled in these experiments, some salt-fed animals never develop hypertension (高血压) whereas a few rapidly developed very severe hypertensions followed by early death. These marked variations were interpreted to result from differences in genetic constitution. By mating in successive generations only those animals that failed to develop hypertension from salt ingestion, a resistant strain (the R strain) has been evolved in which consumption of large quantities of salt fails to influence the blood pressure significantly. In contrast, by mating only animals that quickly develop hypertension from salt, a sensitive strain (the S strain) has also been developed. The availability of these two strains permits investigations not therefore possible. They provide a plausible laboratory model on which to investigate some clinical aspects of the human developing methods by which genetic susceptibility (敏感性) of human beings to high blood pressure can be defined without waiting for its appearance.

单选题Travel Across Africa For six hours we shot through the barren (荒芜的) landscape of the Karoo desert in South Africa, just rocks and sand and baking sun. Knowing our journey was ending, Daniel and I just wanted to remember all we had seen and done. He used a camera. I used words. I had already finished three notebooks and was into the fourth, a beautiful leather notebook. I"d bought in a market in Mozambique. Southern Africa was full of stories and visions. We were almost drunk on sensations. The roaring (咆哮) of the water at Victoria Falls, the impossible silence of the Okavango Delta in Botswana. And then the other things: dogs in the streets, whole families in Soweto living in one room, a kilometer from clean water. As we drove towards the setting sun, a quietness fell over us. The road was empty-we hadn"t seen another car for hours. And as I drove, something caught my eye. Something moving closes enough to touch them, to smell their hot breath. I didn"t know how long they had been there next to us. I shouted to Dan: "Look!" But he was in a deep sleep, his camera lying useless by his feet. They raced the car for a few seconds, and then disappeared far behind us, a memory of heroic forms in the red landscape. When Daniel woke up an hour later I told him what had happened. "Wild horses?" He said, "Why didn"t you wake me up, Sophia?" "I tried. But they were gone after a few seconds." "Are you sure you didn"t dream it?" "You were the one who was sleeping!" "Typical," He said, "The best photos are the ones we never take." We checked into a dusty hotel and slept the sleep of the dead.

单选题At the meeting, Smith argued mightily in favor of the proposal.

单选题Lowering the Risk of Heart Disease Like millions of other Americans, I come from a family with a history of the heart disease. My father had his first three heart attacks when he was only thirty-one. I was three years old at that time. I grew up with heart disease. It was there, but I didn"t take it seriously. When I was thirty-one, my blood cholesterol (胆固醇) level was measured for the first time. It was 311 mg/dl, the doctor told me—an extremely high level that put me at a very high risk of heart disease, especially with my family history. He sent me to the National Institutes of Health (NIH) to be screened for participation in a clinical trial. The trial was designed to test the effect of lowering blood cholesterol on the risk of heart disease. At NIH, physicians explained the degree of risk associated with my blood cholesterol level and the nature of the experiment. This test involves putting a tube through a leg artery (动脉) up to the heart. The death rate for the test was only 1 in 100, I was assured. Learning about the risks of the experiment as well as the risk associated with my raised blood cholesterol level scared the life out of me. Although I was excluded from participating in the study, the experience may well have saved my life. For the first time, I began to realize the seriousness of high blood cholesterol. It was a heart attack just waiting to happen. But equally important, I got a taste of what it is like to be a patient, to have tests done on me and to think of myself as sick. This was hard to take. This experience taught me two lifesaving lessons. First, although I felt fit and strong, I was actually at high risk for heart disease because of my high blood cholesterol level. And with my family history, it could not be ignored. Second, I could lower my blood cholesterol level simply by changing what I ate.

单选题The committee is {{U}}waiting for{{/U}} a decision form the headquarters before it takes any action.

单选题You should take books with you when you go out with your child.

单选题As aquatic plants moved millions of years ago from the ocean to the land, they underwent a number of {{U}}adaptations{{/U}}.

单选题Asbestos is a mineral fiber that can cause cancer if inhaled. A．picked up B．taken indoors C．breathed in D．eaten up

单选题It will absorb a large amount of money to decorate the office.

单选题The concept of upward social mobility has been an abiding feature of American life.

单选题Of all the wild dogs, none is more closely related to the {{U}}domesticated{{/U}} dog than the wolf.

单选题If you don"t quit smoking, you"ll never get better.

单选题The word“sullen”(paragraph 3)could be best replaced by

单选题When an electric current {{U}}flows{{/U}} through a wire, a magnetic field appears around the wire.

单选题My grandfather had always taken a ______ interest in my work, and I had an equal admiration for the stories of his time.A. splendidB. weightyC. vagueD. keen