题目内容
计算机的______和软件是相辅相成的，并且在一定的条件下，两者可以相互转换。
查看答案
搜索结果不匹配？点我反馈
更多问题
It has been almost half a decade since Norman Mailer described leas Vegas in his novel The American Dream. But it (1) to be one of the most (2) and exhilarating (使人愉快的) holiday destinations in the world. An end-less (3) of colorful sights and activities are surrounded by skyscrapers and the magnificent Nevada desert. With (4) shopping, luxury spas, five-star dining and some of the most extravagant entertainment, you will (5) see, this is a city (6) offers an experience like no other. Perhaps the enduring appeal of this " (7) capital of the world", though, is that it always has something (8) to offer. Recently the Hard Rock Café has been (9) up its act, completing with a new 42 000 sq ft venue, 1 000-seater cinema and an "interactive rock wall"-allowing customers the chance to (10) images of Hard Rock’s collection. City Center is an $ 8.5 billion (￡5.3 billion) complex on the Strip; a place that, in a city already (11) with extraordinary casinos (娱乐场) and hotels, stands out from the (12) It was the largest privately (13) construction project in the US and has three stand-alone hotels, a sprawling shopping and entertainment district and two 37-storey glass towers of (14) flats, designed by the likes of Norman Foster. Another Las Vegas (15) , Planet Hollywood, has (16) with luxury developers to create Westgate Towers--where you could own a piece of the action and a chance to come back to Las Vegas every year. (17) , the only thing you’ll (18) of in Vegas is not knowing which club, restaurant or spa to choose from. But then you can always ask a(n) (19) or the concierge--the fantastic thing about this city is that its residents (20) it as much as you will.
进境一年生植物繁殖材料至少隔离两个生长期。（）
[A] In our time women have an average lifespan of almost 80 years; double of what it was in the last century. Motherhood can be postponed and in theory marriage can be postponed. Women in the US are studying more than men and they may become main breadwinner in the near future.[B] Many women go through life thinking, consciously or unconsciously, that a man will solve all their problems,"Once we are married, everything will be OK. " This attitude only set us up for failure. Men are not princesready to take any challenge to rescue the princesses; they are human beings with their own needs and fears.[C] Carrie was wondering in her bedroom about the comment that her friend, New York socialite Charlotte York, made "Women want to be rescued. " Carrie wonders, "Is that true Is that the only thing women want Rescued by whom If the prince did not kiss Snow White, would she have been frozen forever or would she have woken up anyway and moved on" Snow White probably had no other chance, but we do.[D] No wonder our society has changed. On the other hand, our values have not fast enough and many women, more so Hispanic women, are just waiting to be rescued by the prince. These women have not realized they no longer need to be rescued; they need a man for other reasons, not to take care of them.[E] Women in our society have so many options that we do not need anybody else to rescue us; we are the only ones that can rescue ourselves. If you have areas of your life that you want to improve, go ahead; do it for you and for you only, or accept yourself as you are. Do not be so naive that you think someone else can take care of all your problems. Life does not work like that. Live life to the fullest, be happy with who you are and you will see that if you are happy with yourself, you will make others happy, including your man.[F] Our society has changed in a remarkable way in the last 50 years or so. And there are many reasons for it. At the beginning of the 20th century women’s lifespan was about 40 years. Therefore, life needed to start earlier if a woman were going to live for only 40 years; motherhood was a priority. Men used to work and women stayed at home and took care of them and their kids. Women could not survive without a man; women needed to be rescued.[G] Women are caregivers. We are strong and smart and we have the ability to take care of ourselves; we do not need to be rescued by anyone. When we are giving our power to others in exchange for security, we are also giving up our freedom. Are you waiting to be rescued Do you ever think like thatOrder: 43
A few milliamps of electricity can cause plants to increase synthesis of chemicals. These compounds often also have a pharmacological (related to medicine) or commercial value, so the trick could be used to help increase yields of commercially useful biologicals. Artemisinic acid, from sweet wormwood, for example, is used in malarial medications, and shikonin (紫草素), from the purple gromwell plant, is used against skin infections. Researchers have long known that stressing plants can force them to take defensive action, often ramping up the production of protective chemicals that, for example, make them more resistant to insect attack. It has become common practice to stress such plants into increasing their yields. This is usually clone using physical stress elicitors (诱导子), including bits of the micro-organisms that normally attack the plants, or irritants made from metallic compounds such as copper chloride. These are effective, but they come at a cost. Most elicitors are toxic to plants and can build up in tissues, making it necessary to occasionally "clean" a plant of the chemicals so they keep having the same effect. Recently, research groups at the University of Arizona in Tucson found that the application of an electric current to the hairy roots of the poisonous herb Hyoscyamus muticus stimulated the production of the herb’s toxin hyoscyamine (天仙子胺). This unpublished finding inspired Hans Van Etten, also of the University of Arizona, and his colleagues to test sub-lethal levels of electrical currents on other plants, to assess electricity’s potential to elevate chemical production. The researchers exposed eight different plant species (ranging from Japanese pagoda tree seedlings to pea plants) to weak electrical currents of 30 milliamps. Seven of the plants increased their production o defensive chemicals. The average boost of chemical production was 20 times, they report in Biotechnology Progress. One plant, a type of alfalfa, increased its chemical yield by 168 times. These values are very similar to those achieved using chemical elicitors, and seem to have no lethal effects-just a negative effect on growth. The treatment can be used over and over again without the build-up of any unwanted material. The useful compounds would be very easy to harvest: they simply pour out into solution if the plants are grown hydroponically. "The fact that we can use electricity instead of toxic materials to elicit chemical production is very exciting because it means we get to look at how these chemicals form without having to constantly add and remove toxins from the system," says Van Etten. "This is a really novel and creative approach that I’ve never seen before," says plant metabolic engineer Fabricio Medina Bolivar from Arkansas State University in Jonesboro. "The possibilities for using electricity with plants in this way are absolutely tremendous. \ The views of Fabricio and Van Etten towards the way of using electricity to elicit chemical production are ______.
微信支付 
支付宝支付