单选题I admit I have made a mistake, ______ I deny the serious consequence it may have.

单选题The good news______us, for we had been very anxious.

单选题When I found the light switch, the unshaded bulb only illuminated two small cats, sitting on the table ______ round the inside of the empty ham tin.

单选题{{B}}Passage 2{{/B}} As one works with color in a practical or experimental way, one is impressed by two apparently unrelated facts. Color as seen is a mobile changeable thing depending to a large extent on the relationship of the color to other colors seen simultaneously. It is not fixed in its relation to the direct stimulus which creates it. On the other hand, the properties of surfaces that give rise to color do not seem to change greatly under a wide variety of illumination colors, usually (but not always) looking much the same in artificial light as in daylight. Both of these effects seem to be due in large part to the mechanism of color adaptation mentioned earlier. When the eye is fixed on a colored area, there is an immediate readjustment of the sensitivity of the eye to color in and around the area viewed. This readjustment does not immediately affect the color seen but usually does affect the next area to which the gaze is shifted. The longer the time of viewing, the higher the intensity, and the larger the area, the greater the effect will be in terms of its persistence in the succeeding viewing situation. As indicated by the work of Wright and Shouted, it appears that, at least for a first approximation, full adaptation takes place over a very brief time if the adapting source is moderately bright and the eye has been in relative darkness just previously. As the stimulus is allowed to act, however, the effect becomes more persistent in the sense that it takes the eye longer to regain its sensitivity to lower intensities. The net result is that, if the eye is so exposed and then the gaze is transferred to an area of lower intensity, the loss of sensitivity produced by the first area will still be present and appear as an "afterimage" superimposed on the second. The effect not only is present over the actual area causing the "local adaptation" but also spreads with decreasing strength to adjoining areas of the eye to produce "lateral adaptation." Also, because of the persistence of the effect if the eye is shifted around from one object to another, all of which are at similar brightness or have similar colors, the adaptation will tend to become uniform over the whole eye.

单选题The other problem that arises from the employment of women is that of the working wife. It has two aspects: that of the wife who is more of a success than her husband and that of the wife who must rely heavily on her husband for help with domestic tasks. There are various ways in which the impact of the first difficulty can be reduced. Provided that husband and wife are not in the same or directly comparable lines of work, the harsh fact of her greater success can be obscured by a genial conspiracy to reject a purely monetary measure of achievement as intolerably crude. Where there are ranks, it is best if the couple work in different fields so that the husband can find some special reason for the superiority of the lowest figure in his to the most elevated in his wife"s. A problem that affects a much larger number of working wives is the need to reallocate domestic tasks if there are children. In The Road to Wigan Pier George Orwell wrote of the unemployed of the Lancashire coalfields. "Practically never.., in a working- class home, will you see the man doing a stroke of the housework. Unemployment has not changed this convention, which on the face of it seems a little unfair. The man is idle from morning to night but the woman is as busy as ever—more so, indeed, because she has to manage with less money. Yet so far as my experience goes the women do not protest. They feel that a man would lose his manhood if, merely because he was out of work, he developed in a "Mary Ann". " It is over the care of young children that this re-allocation of duties becomes really significant. For this, unlike the cooking of fish fingers or the making of beds, is an inescapably time-consuming occupation, and time is what the fully employed wife has no more to spare of than her husband. The male initiative in courtship is a pretty indiscriminate affair, something that is tried on with any remotely plausible woman who comes within range and, of course, with all degrees of tentativeness. What decides the issue of whether a genuine courtship is going to get under way is the woman"s response. If she shows interest the engines of persuasion are set in movement. The truth is that in courtship society gives women the real power while pretending to give it to men. What does seem clear is that the more men and women are together, at work and away from it, the more the comprehensive amorousness of men towards women will have to go, despite all its past evolutionary services. For it is this that makes inferiority at work abrasive and, more indirectly, makes domestic work seem unmanly, if there is to be an equalizing redistribution of economic and domestic tasks between men and women there must be a compensating redistribution of the erotic initiative. If women will no longer let us beat them, they must allow us to join them as the blushing recipients of flowers and chocolates.

单选题One of the main ways to stay out of trouble with government agents is to keep a low______, i. e. stay away from those situations wherein you call attention to yourself.(2007年中国科学院考博试题)

单选题The press demands that politicians______the sources of their income.

单选题It seems that he never knows how to speak in a ______ way.

单选题This ______ was conducted to find out how many people prefer rice.

单选题Violin prodigies, I learned, have come in distinct waves from distinct regions. Most of the great performers in the late 19th and early 20th centuries were born and brought up in Russia and Eastern Europe, I asked Isaac Stern, one of the world's greatest violinists the reason for this phenomenon. "It is very clear," he told me, "They were all Jews (犹太人) and Jews at the time were severely oppressed and ill-treated in that part of the world. They were not allowed into the professional fields, but they were allowed to achieve excellence on a concert stage." As a result, every Jewish parent's dream was to have a child in the music school because it was a passport to the West. Another element in the emergence of prodigies, I found, is a society that values excellence in a certain field to nurture (培育) talent. Nowadays, the most nurturing societies seem to be in the Far East. "In Japan, a most competitive society, with stronger discipline than ours." says Isaac Stem, children are ready to test their limits every day in many fields, including music. When Western music came to Japan after World War Ⅱ, that music not only became part of their daily lives, but it became a discipline as well. The Koreans and Chinese as we know, are just as highly motivated as the Japanese. That's a good thing, because even prodigies must work hard. Next to hard work, biological inheritance plays an important role in the making of a prodigy. J. S. Bach, for example, was the top of several generations of musicians, and four of his sons had significant careers in music.

单选题Walking is Britain's most popular outdoor ______ and is the most pleasant and satisfying way of discovering the countryside. A. pastime B. recreation C. entertainment D. pursuit

单选题Some scientists are dubious of the claim mat organisms______with age as an inevitable outcome of living.

单选题An embarrassing blunder nearly ______ his career before it got off the ground.

单选题We were______whether to buy a new motor-car.

单选题Formulated in 1823, the Monroe Doctrine______that the Americas were no longer open to European colonization.

单选题They moved to Portland in 1998 and lived in a big house,______to the south. (北京大学2006年试题)

单选题By far the most common difficulty in study is simple failure to get down to regular concentrated work. This difficulty is much greater for those who do not work to a plan and have no regular routine of study. Many students muddle along, doing a hit of this subject or that, as the mood takes them, or letting their set work pile up until the last possible moment. Few students work to a set time-table. They say that if they did construct a timetable for themselves they would not keep to it, or would have to alter it constantly, since they can never predict from one day to the next what their activities will be. No doubt some temperaments take much more kindly to a regular routine than others. There are many who shy away from the self-regimentatign of a weekly time-table, and dislike being tied clown to a definite programme of work. Many able students claim that they work in cycles. When they become interested in a topic they work on it intensively for three or four days at a time. On other days they avoid work completely. It has to be confessed that we do not fully understand the complexities of the motivation to work. Most people over 25 years of age have become conditioned to a work routine, and the majority of really productive workers set aside regular hours for the more important aspects of their work. The "tough-minded" school of workers is usually very contemptuous of the idea that good work can only be done spontaneously, under the influence of inspiration. Those who believe that they need only work and study as the fit takes them have a mistaken belief either in their own talent or in the value of "freedom". Freedom from restraint and discipline leads to unhappiness rather than to "self-expression" or "personality development". Our society insists on regular habits, timekeeping and punctuality, and whether we like it or not, if we mean to make our way in society we have to comply with its demands.

单选题 The fitness movement that began in the late 1960s and early 1970s centered around aerobic exercise. Millions of individuals became {{U}}(1) {{/U}} in a variety of aerobic activities, and {{U}}(2) {{/U}} thousands of health spas {{U}}(3) {{/U}} around the country to capitalize on this {{U}}(4) {{/U}} interest in fitness, particularly aerobic dancing for females. A number of fitness spas existed {{U}}(5) {{/U}} to this aerobic fitness movement, even a national chain with spas in most major cities. However, their {{U}}(6) {{/U}} was not on aerobics, {{U}}(7) {{/U}} on weight-training programs designed to develop muscular mass, {{U}}(8) {{/U}}, and endurance in their primarily male {{U}}(9) {{/U}}. These fitness spas did not seem to benefit {{U}}(10) {{/U}} from the aerobic fitness movement to better health, since medical opinion suggested that weight-training programs {{U}}(11) {{/U}} few, if {{U}}(12) {{/U}}, health benefits. In recent years, however, weight training has again become increasingly {{U}}(13) {{/U}} for males and for females. Many {{U}}(14) {{/U}} programs focus not only on developing muscular strength and endurance but on aerobic fitness as well. {{U}}(15) {{/U}}, most physical-fitness tests have usually included measures of muscular strength and endurance, not for health-related reasons, but primarily {{U}}(16) {{/U}} such fitness components have been related to {{U}}(17) {{/U}} in athletics. {{U}}(18) {{/U}}, in recent years, evidence has shown that training programs designed primarily to improve muscular strength and endurance might also offer some health {{U}}(19) {{/U}} as well. The American College of Sports Medicine now {{U}}(20) {{/U}} that weight training be part of a total fitness program for healthy Americans.

单选题The result of deserved-punishment justice is ______.