题目内容
Marvin Burnham We are in an energy crisis and we will have to do something quickly. Fossil fuels are rapidly running out. The tragedy is that fossil fuels are far too valuable to waste on the production of electricity. Just think of all the things you can make from oil! If we don’t start thinking ways to face the problem, it will be too late.Catherine Woodstock Instead of burning fossil fuels we should be concentrating on more economic uses of electricity, because electricity can be produced from any source of energy. We can do research on solar energy, wind power, wave power, tidal power, hydroelectric schemes etc; otherwise, our fossil fuels will run out, and we’ll all freeze or starve to death. We really won’t survive unless we start working on cleaner, safer sources of energy.Michael Parkhurst In the past, we consumed too much energy. If we didn’t waste so much energy, our resources would last longer. You can save more energy by conservation than you can produce for the same money. Unless everyone realize the seriousness of energy crisis and stop wasting, our resources will not support us for long.Charles Wicks I don’t agree with some of the estimates of world energy reserves. More oil and gas is being discovered all the time. If we listened to the pessimists, none of us would sleep at night. In the short term, we can still rely on the fossil fuels—oil, coal and gas. Researches are going on and new sources of energy will be found in the future. So there is nothing to worry about.Jennifer Hughes Some people think nuclear power is away to solve the problem, but think of the potential danger of it. There is no perfect machine. I mean, why do aeroplanes crash Machines fail. People make mistakes. What would happen if there were a serious nuclear accident And an accident must be inevitable—sooner or later. Huge areas would be evacuated, and they could remain contaminated with radioactivity for years. If it happened in your area, you wouldn’t get a penny in compensation. No insurance company covers nuclear risks. Radioactivity causes cancer and may affect future generations, too. Now match each of the schools to the appropriate statement. Note: there are two extra statements.[A] We should take steps to solve the problem.[B] Saving the present resources is the most important thing.[C] Nuclear power is an ideal alternative.[D] We should develop alternative sources of power.[E] I’m optimistic about the future of energy.[F] Nuclear power is not secure.[G] Energy crisis is inevitable. ( ) Jennifer Hughes
查看答案
搜索结果不匹配？点我反馈
更多问题
某企业2008年成立，涉及到印花税的业务如下： (1)注册资本2000万元，资本公积200万元。公司当年启用设置账簿18本，其中包括实收资本、资本公积账簿各1本。 (2)当年领受营业执照正副本、税务登记证正副本、卫生许可证、组织机构代码证、商标注册证。当年12月营业执照被火灾烧毁，年末尚未重新办理。 (3)签订以物易物交易合同一份，用自产产品换取房屋，合同注明的交易价值为200万元。 (4)与建设方甲企业签订一份建筑承包合同，合同金额6000万元(含建设方提供的材料价款3500万元)。施工期间，又将其中价值800万元的安装工程转包给乙企业，并签订转包合同。 根据上述资料和税法有关规定，回答下列问题： 计算以物易物应缴纳的印花税为( )元。
Taking a Nap During the Day Medical experts say most Americans do not get (51) sleep. They say more Americans need to rest for a short period in the middle of the day. They are advising people to sleep lightly before (52) with other activities. One study earlier this year found that persons who sleep for a few minutes during the day were less (53) to die of disease. The study followed more than 2,300 Greek adults (54) about six years. Adult who rested for half an hour (55) three times a week had a 37 percent lower risk of dying from heart disease than those who did not nap. Study organizers said the strongest evidence was in working men. They said naps might improve (56) by mitigating tension caused by work. Some European and Latin American businesses have supported the (57) of napping for many years. They urge people to (58) work, go home and have a nap before returning. In the United States, some companies let workers rest briefly in their offices. They believe this reduces in their offices. They believe this reduces (59) and accidents, and (60) increases the amount of work a person can do. Sleep experts say it is likely that people make more mistakes at work than at other times. They say people should not carry out important duties when they feel (61) . And they say the best thing to do is to take a nap. About twenty minutes of rest is (62) you need. Experts say this provides extra energy and can increase your effectiveness (63) the end of the day. But experts warn that a nap (64) last no more than twenty to thirty minutes. A longer nap will put the body into deep sleep and waking up will be (65) .
Irish Dolphins may Have a Unique Dialect Irish scientists monitoring dolphins living in a river estuary in the southwest of the country believe they may have developed a unique dialect to communicate with each other. The Shannon Dolphin and Wildlife Foundation (SDWF) has been studying a group of up to 120 bottle-nose dolphins in the River Shannon using vocalizations collected on a computer in a cow shed near the River Shannon. As part of a research project, student Ronan Hickey digitized and analyzed a total of 1,882 whistles from the Irish dolphins and those from the Welsh dolphins on a computer and separated them into six fundamental whistle types and 32 different categories. Of the categories, he found most were used by both sets of dolphins but eight were only heard from the Irish dolphins. "We are building up a catalogue of the different whistle types they use and trying to associate them with behavior like foraging, resting, socializing and the communications of groups with calves," project leader Simon Berrow said. "Essentially we are building up what is like a dictionary of words they use or sounds they make." Berrow, a marine biologist, said the dolphins’ clicks are used to find their way around and locate prey. The whistles are communications. "They do a whole range of other sounds like barks, groans and a kind of gunshot," he said. "The gunshot is an intense pulse of sound. Sperm whales use it to stun their prey." "When I first heard it I was surprised as I thought sperm whales were the only species who used it. We can speculate the dolphins are using it for the same reason as the sperm whales," Berrow said. References in local legend indicate there have been dolphins in the Shannon estuary for generations and they may even have been resident there as far back as the 6th century. They are regularly seen by passengers on the Shannon ferry and an estimated 25,000 tourists every year take special sightseeing tours on local boats to visit them. Ronan Hickey analyzed almost 2000 different dialects of the bottle-nose dolphins.
假设窗体中已经有了一个驱动器列表框Drivel和一个目录列表框Dirl，如图20-10所示。当改变了驱动器列表框中的驱动器时，希望在目录列表框中显示相应驱动器的目录结构，可在Drive1_Change事件中输入语句 【7】 。
微信支付 
支付宝支付