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男，55岁。因肺炎入院，应用抗生素和输液后．体温未下降，今晨出现呼吸急促，烦躁，体检：呼吸46次/分。血压 100/70mmHg。脉搏100次/分．口唇有发绀。两肺闻及哮鸣音。 为明确诊断应首选哪项检查
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中华文明历来注重以民为本，尊重人的尊严和价值。早在千百年前，中国人就提出“民为邦本，本固邦宁”、“天地之间，莫贵于人”，强调要利民、裕民、养民、惠民。今天，我们坚持以人为本，就是要坚持发展为了人民、发展依靠人民、发展成果由人民共享，关注人的价值、权益和自由，关注人的生活质量、发展潜能和幸福指数，最终是为了实现人的全面发展。保障人民的生存权和发展权仍是中国的首要任务。我们将大力推动经济社会发展，依法保障人民享有自由、民主和人权，实现社会公平和正义，使13亿中国人民过上幸福生活。
Seed Dispersal A. They fly, float, hitchhike—and even explode. But the many clever ways seeds get around make sense: after all, a plant’s life depends on finding fertile ground in which to grow. The quest for survival has even led plants to develop delightful and devious ways of fooling us into working for them as they send their seeds out to conquer new lands. Birds help some fruits like the like the cherry by eating the fruit around the seed. The mistletoe’s seeds are covered with a sticky substance that substance that sticks to the bird that tries to eat it. The mistletoe’s seeds have to land on the or they die. Some seeds travel by sailing in the wind. Others hitchhike on animals. Some just get blown in the wind. Seeds can also grow in a flower and drop to the ground. When the seed leaves the flower of whatever it was in, it’s called dissemination. This is one of the most important steps in the seed’s life. Some tree seeds drop directly below the parent and die because there is not enough light or food for them to grow. B. The seeds that travel by wind must be light-weight. Some of these seeds have wings, like the maple seed. Some of these seeds have gone 32 miles on a windy day. Another flying seed is the dandelion which gets planted because ants carry the seeds down into their hole. C. Many plants use wind or water to carry their seeds, which are attached to fine, fluffy fibers that act as parachutes. Milkweed and thistle are among the plants whose seeds fly through the air. Trees such as willow, cottonwood, and sycamore, which grow along streams or creeks, drop many of their seeds into the water, where the fluff keeps them afloat on the current so it can carry them to new spots. Coconuts may drift for several months and travel for up to 1,200 miles (2,000 kin) before reaching dry land. The coconuts are able to float because of special fibers around their seeds. D. The hitchhikers are built with spikes, such as: the squirting cucumber. Then they travel to another place to grow. Some plants have sacks that explode, bursts open and shoot its seeds up to 27 feet (8m) away from the parent plant. The seeds zoom off and may travel as fast as 62 miles (100kin) per hour. Then there are the leapers, seeds that bounce or jump away from the parent plant. Jewelweed and witch hazel have seed cases that are so constructed that when they dry out, the slightest touch causes the case to burst and project the mature seeds through the air. Black walnuts have spongy hulls so that they bounce when they hit the ground and roll away from the tree. E. At first glance some seeds’ designs make plants seem downright intelligent. Take apples, for instance. These sweet fruits have evolved to be bright and shiny for good reason: they attract people and other animals. Drawn in by their effective advertising, we do the work of carrying apple seeds to new territory where the species can gain a toehold and expand. Indeed, we like apples so much that we’ve planted orchards especially for our favorite fruit. The practice has prompted some biologists to ask who really is the boss in this relationship, do the apple trees work for us—or do we work for them F. Similar examples can be found throughout nature, from fig-eating bats that become unwitting cargo planes for fig seeds, to squirrels and woodpeckers that unknowingly help oak trees spread their acorns. An African melon that grows a gourd-shaped bladder of water deep underground. In the dry season, aardvarks sniff out the watery melons, digging deep to quench their thirst. In the process, however, the thirsty aardvarks also sip up a few pit-like seeds, which they later deposit inside fertilizing manure. It’s hard to say who gets the better end of the deal: the melon or the mammal. G. Both plant and animal, of course, get something out of these mutually beneficial relationships. Apple trees, for instance, didn’t set out to fool people into picking their fruit. But somewhere along the line, certain apple trees ended up with a combination of genes that made their fruit a bit brighter or sweeter than all the other apples. Since we liked these apples so much, we began selectively planting the trees, and learned how to breed even sweeter varieties. In exchange for the tender, nutritious fruit, the trees get steady care and even protection from potential enemies, such as insects and browsing deer. H. Evolutionary accidents may explain how other types of seeds developed, too. On the island of Mauritius, for instance, there once were trees that dropped their tasty fruits full of seeds to the ground. Then, a new bird arrived on the island. It loved the fruits, but the tree’s seeds couldn’t survive the trip through the bird’s stomach. As a result, the tree was in trouble, since fewer of its seeds were surviving. Then, perhaps through a random genetic mutation, one tree, produced fruit with tougher seeds that could survive being eaten by the birds. Given this significant advantage, the tougher calvaria soon began to thrive. Eventually, they crowded out their ancestors completely. I. However evolution can sometimes produce a plant that is too reliant on a particular animal for survival. That’s exactly what happened on Mauritius. There, some biologists believe that lonely 300-year-old calvaria trees await a bird that will never return: the dodo. In 1598, Dutch explorers established a colony on Mauritius. In the search for food to eat and sell, the settlers plundered the island’s natural resources, killing giant turtles, lizards, and the huge, flightless dodo birds with abandon. When the settlers did in the dodo, however, they may have also put the death of the calvaria in motion. Some biologists believe the dodos ate the tree’s fruit, and that the trip through the bird’s stomach helped prepare the seeds for germination. But now that their partner in life is gone, only a few calvaria survive. They are silent reminders of a lost past, with their seed-bearing fruit littering the ground and inviting a feast that will never come. The melon and the mammal benefit from each other.
Politicians do it. Charities too. And now for-profit entrepreneurs are tapping the Internet to get small amounts of money from lots and lots of supporters. One part social networking and one part capital accumulation, crowd funding websites seek to harness the enthusiasm and pocket money of virtual strangers, promising them a cut of the returns. CatwalkGenius.com helps the common people to finance designers. British documentary filmmaker Franny Armstrong raised more than $450,000 ($815,000) to finance "The Age of Stupid", which she hopes will premiere at the Sundance Film Festival in January. People who gave 20 quids ($35) got a credit on the film’s website; those who gave ￡5,000 ($9,000) and up will get a percentage of the profits, if there are any. The term crowd funding derives from another neologism: crowdsourcing, i.e., outsourcing to the public jobs typically performed by employees. Want to start a T-shirt business Why not have the masses submit designs (crowdsourcing) and finance the ones they like (crowd funding) That’s what Cameesa.com is doing, in a fashion-forward knockoff of Threadless.com which generated $17 million in revenues in 2006 by having the crowd choose T-shirt designs. "If you put money down to support a design, that’s a strong indicator of actual demand," says Cameesa founder Andrew Cronk, a programmer in Chicago. Likewise, SellaBand.com connects music lovers with unsigned artists looking to record albums. Musicians have profiles with bios and songs, and as soon as they sell 5,000 shares, at $10 a pop, it’s time to head to the recording studio. In two years, more than 30,000 people have ponied up more than $2.5 million, and 25 musicians have cut or are cutting albums. So far, the average return on each $10 investment is about $2.50 from CD sales and ads. The money gets split among the artist, SellaBand and the artist’s "believers"—an apt description for those who contributed. "People become emotionally invested as part of a team," says Mark Maclaine, bassist in the British band Second Person, which in six months raised $50,000 from 741 investors and has since had its video featured on VH1 UK and MTV UK. "Right now things are going really well," says Maclaine, who is wholeheartedly pursuing music full time. "Maybe I’ll be working in Wal-Mart in a few months." But at least 741 people are betting he won’t be. Which of the following is the best title for this passage
Black Holes Most scientists agree that black holes exist but are nearly impossible to locate. A．black hole in the universe is not a solid object, like a planet, but it is shaped like a sphere (球体). Astronomers (天文学家) think that at the center of a black hole there is a single point in space with infinite (无限的) density (稠密). This single point is called a singularity (奇点). If the singularity theory is correct, it means that when a massive star collapses, all the material in it disappears into the singularity. The center of a black hole would not really be a hole at all, but an infinitely dense point. Anything that crosses the black hole is pulled in by its great gravity. Although black holes do exist, they are difficult to observe. These are the reasons. ·No light or anything else comes out of black holes. As a result, they are invisible to a telescope. ·In astronomical terms, black holes are truly tiny. For example, a black hole formed by the collapse of a giant star would have an event horizon (视界) only 18 miles across. ·The nearest black holes would be dozens of light years away from Earth. One light year is about 6 trillion (万亿) miles. Even the most powerful telescopes could not pick out an object so small at such a great distance. In 1994 the Hubble Space Telescope provided evidence that black holes exist. There are still answers to be found, however, so black holes remain one of the mysteries of the universe. Black holes are part of space.
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