The hardness of mica is （  ）.

A . A.undercutting B . B.sanding C . C.burnishing D . D.filing

A . it will be preceded by a sudden increase in wind speed B . it will be preceded by a sudden decrease in wind speed C . the wind speed will not change as it passes D . the wind will back rapidly to left in a counterclockwise direction as it passe

A . All types of the 2.5" disk drives offered by the DS8800 system have higher performance than the 3.5" disk drives supported by DS8700 B . The 2.5" disk drives included on the DS8800 support 6Gbps SAS； the 3.5" disk drives in DS8700 are 4 Gbps FC C . The 2.5" disk drives included on the DS8800 support 8Gbps SAS； the 3.5" disk drives in DS8700 are 4 Gbps FC D . The 2.5" 15k rpm drives offered by the DS8800 system support 6Gbps SAS-2

A . Change the advanced power settings of the Balanced power plan. B . Configure the portable computer to use the Power saver power plan. C . Configure the portable computer to use the High performance power plan. D . Restore the Power Saver power plan to the default settings.

A . A B . B C . C D . D E . E

A．That B．What C．Whether D．Which

But is there another cost, a deeper cost, to documenting a life experience instead of simply enjoying it？ "You hear that you shouldn&39;t take all these photos and interrupt the experience, and it&39;s bad for you, and we&39;re not living in the present moment," says Kristin Diehl, associate professor of marketing at the University of Southern California Marshall School of Business. Diehl and her fellow researchers wanted to find out if that was true, so they embarked on a series of nine experiments in the lab and in the field testing people&39;s enjoyment in the presence or absence of a camera. The results, published in the Journal of Personality and Social Psychology, surprised them. Taking photos actually makes people enjoy what they&39;re doing more, not less. "What we find is you actually look at the world slightly differently, because you&39;re looking for things you want to capture, that you may want to hang onto," Diehl explains. "That gets people more engaged in the experience, and they tend to enjoy it more." Take sightseeing. In one experiment, nearly 200 participants boarded a double-decker bus for a tour of Philadelphia. Both bus tours forbade the use of cell phones but one tour provided digital cameras and encouraged people to take photos. The people who took photos enjoyed the experience significantly more, and said they were more engaged, than those who didn&39;t. Snapping a photo directs attention, which heightens the pleasure you get from whatever you&39;re looking at, Diehl says. It works for things as boring as archaeological(考古的)museums, where people were given eye-tracking glasses and instructed either to take photos or not. "People look longer at things they want to photograph," Diehl says. They report liking the exhibits more, too. To the relief of Instagrammers(Instagram用户)everywhere, it can even makes meals more enjoyable. When people were encouraged to take at least three photos while they ate lunch, they were more immersed in their meals than those who weren&39;t told to take photos. Was it the satisfying click of the camera？ The physical act of the snap？ No, they found; just the act of planning to take a photo—and not actually taking it—had the same joy-boosting effect. "If you want to take mental photos, that works the same way," Diehl says. "Thinking about what you would want to photograph also gets you more engaged." What does the author say about photo-taking in the past？ A.It was a painstaking effort for recording life’s major events. B.It was a luxury that only a few wealthy people could enjoy. C.It was a good way to preserve one’s precious images. D.It was a skill that required lots of practice to master. Kristin Diehl conducted a series of experiments on photo-taking to find out __________.A.what kind of pleasure it would actually bring to photo-takers B.whether people enjoyed it when they did sightseeing C.how it could help to enrich people’s life experiences D.Whether it prevented people enjoying what they were doing What do the results of Diehl’s experiments show that people taking photos？A.They are distracted from what they are doing. B.They can better remember what they see or do. C.They are more absorbed in what catches their eye. D.They can have a better understanding of the world. What is found about museum visitors with the aid of eye-tracking glasses？A.They come out with better photographs of the exhibits. B.They focus more on the exhibits when taking pictures. C.They have a better view of what are on display. D.They follow the historical events more easily. What do we learn from the last paragraph？A.It is better to make plans before taking photos. B.Mental photos can be as beautiful as snapshots. C.Photographers can derive great joy from the click of the camera. D.Even the very thought of taking a photo can have a positive effect. 请帮忙给出每个问题的正确答案和分析，谢谢！

A．which B．that C．who D．whom

A．the hard rice and overooked vegetables B．the poor quality and high price of the food C．the terrible service in the restaurant D．the hard rice and poor service in the restaurant．

When it comes to success, luck can mean being in the right place to meet someone, or having the right skills to get a job done. It might mean turning down an offer and then having a better offer come along. Nothing can replace hard work, but working hard also means you're preparing yourself opportunity. Opportunity very often depends on luck. How many of the great inventions and discoveries came about through a lucky mistake or a lucky chance？ One of the biggest lucky mistakes in history is Columbus' so-called discovery of America. He enriched his sponsors and changed history, but he was really looking for India. However, Columbus' chance discovery wasn't pure luck. It was backed up by years of studying and calculating. He worked hard to prove his theory that the world was round. People who work hard help make their own luck by being ready opportunity knocks. When it comes to success, hard work and luck are always hand in hand. (30) A．Hard work is the most important thing for one's success. B．Hard work may invite good luck. C．Good luck plays an important role in one's success. D．Success has nothing to do with luck.

A．It is B．that when C．a little D．in the days

I had an experience recently with someone admitting to me that he had made a mistake fifteen years ago. He told me he had been the manager of a grocery store in the neighborhood where I grew up, and he asked me if I remembered the egg cartons. Then he related an incident and I began to remember vaguely the incident he was de scribing. I was about eight years old at the time, and I had gone into the store with my mother to do the weekly grocery shopping. On that particular clay, I must have found my way to the dairy food department where the incident tool place. (80) There must have been a special sale on eggs that day be cause there was an impressive display of eggs in dozen and half-dozen cartons. The cartons were stacked three or four feet high. I must have stopped in front of a display to admire the stacks. Just then a woman came by pushing her grocery cart and knocked off the stacks of cartons. For some reason, I decided it was up to me to put the display back together; so I went to work. The manager heard the noise and came rushing over to see what had happened. When he appeared, I was on my knees inspecting some of the cartons to see if any of the eggs were broken, but to him it looked as though I was culprit(罪犯). He severely scolded me and wanted me to pay for any broken eggs. I protested my innocence and tried to explain, but it did no good. Even though I quickly forgot all about the incident, apparently the manager did not. How old was the author when he wrote this article？ A．About 8. B．About 18. C．About 23. D．About 15.

their bread their doughnuts their hamburgers dumplings

Stress is natural part of everyday life and there is no way to 【C4】______ it. In fact, it is not the bad thing it is often 【C5】______ to be. A certain amount of stress is vital to provide 【C6】______ and give purpose to life. It is only 【C7】______ the stress gets out of control that it can lead to 【C8】______ performance and ill health. The amount of stress arsons can withstand depends very much 【C9】______ the individual. Some people are not afraid of stress, and 【C10】______ characters are obviously prime material for managerial responsibilities. Others lose 【C11】______ at the first signs of unusual difficulties. When 【C12】______ to stress, in whatever form, we react both chemically and 【C13】______ . In fact we make choice between "flight and fight" and in more primitive days the choices made the difference 【C14】______ life and death. The crises we meet today are 【C15】______ to be so extreme, but however little the stress, it 【C16】______ the same response. It is when such a reaction lasts long, through continued 【C17】______ to stress, that health becomes 【C18】______ . Such serious conditions as high blood pressure and heart diseases have 【C19】______ links with stress. Since we cannot 【C20】______ stress from our lives (it would be unwise to do so even if we could), we need to find ways to deal with it. 【C1】 A．routine B．habit C．principle D．rule

A、plan B、control C、motive D、honour

A．off B．away C．low D．down

A．that study B．that studies C．who studying D．which are studying

A．that study B．that studies C．who studying D．which are studying