题目内容

呼吸衰竭患者最早、最突出的表现是

A. 紫绀
B. 呼吸困难
C. 血压下降
D. 心率加快
E. 肝、肾功能损害

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心肺复苏不恰当的方法是()

A. 胸部按压80~100次/min
B. 心前区叩击2~3次
C. 单人复苏时,每30秒使肺扩张两次
D. 清理口腔分泌物和异物
E. 双人复苏时,每5秒使肺扩张一次

指导患者正确服用硝酸甘油以缓解心绞痛的方法是

A. 观察头晕、血压升高的表现
B. 药物置于口中,立即用温开水送服
C. 舌下含药时应平卧或坐稳,以防发生低血压
D. 药物在舌下被唾液溶解以减少吸收
E. 如果30分钟后不缓解,再服一片

Bottled water doesn’t get much greener than Belu’s. The British company’s drink was the world’s first to become carbon-neutral, in 2006. Its bottles, made from corn, can be composted into soil. Belu’s profits, meanwhile, are poured into projects that deliver clean water to parts of the world that lack access to it. And amid the thirst for all things sustainable, this has meant Belu — pronounced Blue — has gone down rather well. Sales of just $13,000 in 2004, its launch year, rose to close to $4 million in 2008. Defying the downturn, the company even managed a modest profit. But getting consumers to buy is only half the battle. All the granola credentials in the world won’t fund a promising business. To potential investors, it’s pesky things like risk and reward that still matter most. And as an ambitious nonprofit firm surviving in a ferociously competitive sector — rivals include Coca-Cola and Nestlé — Belu has been stymied more than most. "We’ve struggled to get funding, as Belu is aimed at helping the environment, not lining investors’ pockets," says Reed Paget, the Seattle native who is the company’s chief executive and founder. "That’s put a lot of strain on the company." Bereft of any experience running a business, Paget actually has a pretty remarkable record at Belu: half a million bottles of its water, each emblazoned with environmentally friendly messages, are sold monthly, and it’s now distributed in about 1,000 outlets in Britain. But Belu’s potential would be much bigger — global — if it could get funding. With Belu’s shares held by its own nonprofit, venture-capital and private-equity investors can’t expect the usual juicy reward in exchange for financial backing. Offered a savings-account- like return or the chance to buy shares whose dividends accrue to organizations working in the clean-water field, VCs have balked. "I probably would have had more success robbing banks than getting funding from those sources," Paget says. Environmental charities have been no more forthcoming. Investing in firms like Belu is "not what we’re here to do," says a Greenpeace spokesman. "Our role is campaigning." That’s left the firm reliant on a limited bunch of angel investors — from Body Shop cofounder Gordon Roddick to Big Issue Invest, experts in backing social enterprises — willing to stomach little or no return in exchange for long-term benefits to the environment. With $2.5 million raised through 32 painstaking rounds of funding, "the business is massively undercapitalized," says Ben Goldsmith, a London-based philanthropist and VC who’s among Belu’s creditors. "And that’s a challenge." Why not go the capitalist route and use the profits that a conventionally funded expansion would bring to increase his good works Pointing to the small profit he’s made on modest means, Paget is confident Belu can grow without more serious money. But for the chance to scale up his business, "if we can get it, we would definitely love it," he says. Paget is adamant, though, that it should be on Belu’s terms, not those of a traditional investor. He says it was important "to remove the ’We must maximize profit’ from our management system." Sure, Belu needs to be able to sell for more than the cost of production, but, he says, if it came down to more profit vs. more environmental benefit, VCs may suddenly decide they don’t want to be that deep a shade of green after all. But with Belu being unwilling to accept that risk, the cost to the company may be the sustainable growth of a clearly good business. It can be inferred from the passage that

A. Paget wants to make more profits if more funding can be raised.
Belu could develop much faster if it gets enough funding.
C. Greenpeace is reluctant to invest the nonprofit company.
D. as a social enterprise, Belu needn’t make profits to keep the company going.

One of the unresolved — and rather bitter — disputes in evolutionary biology is between the creeps and the jerks. The creeps (so dubbed by the jerks) think that evolutionary change is gradual. The jerks (so dubbed by the creeps) think it happens in sudden jumps that are separated by long periods of stasis. Probably, both are lame. Work done a couple of years ago by Mark Pagel of Reading University, in England, suggests that about a fifth of evolutionary change happens jerkily at around the time new species form. The rest creeps in gradually over the millennia. Species, however, are not the only things that evolve. Languages do too. And in the current edition of Science, Dr.Pagel and his colleagues publish evidence that they do so in a way which looks intriguingly similar to what happens in species. There was already some historical evidence for this. The English of Geoffrey Chaucer (born in the 14th century), for example, is incomprehensible to modem laymen, whereas that of William Shakespeare (born in the 16th) is not only comprehensible but held by some to be a model. Dr.Pagel, however, wanted to examine the question systematically and to include languages with no literary history in his analysis. To do so he looked at three well-studied parts of the linguistic family tree: the Banut languages of Africa, the Indo-European group from Eurasia and the Austronesians of the Pacific. In all three cases it is pretty clear how the branches connect up, even if it is not always obvious when particular splits occurred. Dr.Pagel did not, however, need to know that. He only needed to know the shape of the tree. That was because his hypothesis was that if linguistic evolution is jerky, the jerks will happen at the points where languages split — the equivalent of species splits in biological evolution. The way to test that is to track back along the branches leading from each existing language, and count the number of splits on each path before you get to the common ancestor of all. His hypothesis turned out to be correct. Languages are formed not, it seems, by a gradual drifting apart of two groups who no longer talk to each other, but by violent rupture. Around a third of the vocabulary differences between modem Bantu speakers arose this way, around a fifth of the differences between speakers of Indo-European languages, and around a tenth of the Austronesians. That compares with around a fifth for biological species. All this suggests that the formation of both languages and species is an active process. For species, adaptations to novel environments and the need to avoid crossbreeding with those on the other side of the split are both plausible hypotheses. For languages, the explanation may be a cultural rather than biological need to distinguish populations. As Noah Webster, the compiler of the first American dictionary put it: "as an independent nation, our honor requires us to have a system of our own, in language as well as government." In other words, if you don’t speak proper, you aren’t one of us. The goal of Dr.Pagel’s study was to

A. examine the languages with no literary history.
B. find out the ancestor of all languages studied.
C. sketch the shape of the linguistic family tree.
D. study language evolution systematically.

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