选择性血管造影术对下列外科疾病具有较好的诊断价值，除了（） A.确定血管疾病 B.判

下列各句中，没有语病句意明确的一句是（ ）

A．有的学生考试前会出现失眠.烦躁等现象，这往往是因为他们太在乎考试成绩，心理负担过重所造成的。

B．联想集团了使客户真正得到没有后顾之忧的服务，率先提出了对所售产品三年内保修，二十四小时服务的承诺。

C．最近一段时间，各种传媒.报纸.电视.广播.互联网大量地报道了美国在阿富汗进行的反对恐怖主义的战争。

D．语文教学要让学生创新，必须利用语文学科特有的优势和独特的能力结构，加强言语操作，创设大语文的学习环境，使学生动起来，在听说读写的训练中，培养他们的创新意识和能力。

电动转辙机内炭刷与换向器呈同心弧面接触，接触面积不少于炭刷面积的（）倍。

A、1/2

B、2/3

C、3/4

D、1/3

离心式风机的工作原理是什么？

全球合作原则的中心环节为（）

A.东西合作

B.南南合作

C.南北合作

D.北北合作

While the ripples of America’s subprime-mortgage crisis have spread far and wide, Latin America—a place long associated with financial disaster—has remained improbably calm. Banks have reported no unpleasant surprises. Brazil and Peru have been blessed with coveted investment-grade ratings. Surprisingly, perhaps the fleetest country of all has been Argentina. Since it emerged from the financial crisis of 2001-02, it has been one of the world’s fastest-growing economies. It is expected to expand faster than most of its neighbors again this year.

Quite simply, it barely has any credit. Back when its economy virtually collapsed, the country suffered a run on its banks, followed by a freeze on withdrawals, and a massive currency devaluation. As a result, bank lending to the private sector shrivelled, from 23.8% of GDP in 2000 to 10.8% in 2003. Since then, it has rebounded to a piddling 13% ; by contrast, the ratio in Brazil was 36.5% in 2006. Almost all of these loans in Argentina are accessible only on a short-term basis.

Once its recovery began in June 2002, Argentina became a paradise for business. Unemployment of over 20% kept wages down, and the devaluation gave exporters an edge on foreign competitors. The ample productive capacity left idle by the crisis meant firms could expand without making big investments. And the windfall profits reaped by agricultural exporters, thanks to record commodities prices, enabled many of them to finance new projects out of earnings. Hence the economy could grow at almost 9% a year with little need for credit.

But such a lucky confluence of factors could not last. Starting in early 2005 ,.inflation picked up, a sign that the installed capacity was starting to limit output. Salaries and prices for raw materials increased sharply, cutting into profits. And farmers were particularly hard hit when the government nearly doubled the taxes in farm exports. Now, just as companies need to embark on big investments if they are to keep growing, their margins are no longer big enough to pay for the expansion and they need to borrow.

So, the time is ripe for the country’s financial system to recover. But a number of things are in the way. Foremost is Argentina’s business risk. Those in the informal economy (which represents over 40% of GDP) can neither save nor borrow legally, lest they become known to the taxmen. The rest remain cowed by memories of the crisis. Although Argentines have poured their savings into property, fuelling a construction boom, they still hold about four-fifths of their deposits abroad.

Inflation, fuelled by a public-spending binge, state-mandated wage increases, and a cheap currency, is not helping either. No one knows how high it is. The consumer-price index is doctored to keep the official rate below 10%, but private estimates suggest it is near 25%. Without a reliable index of inflation, lending is almost impossible, even for the medium term. And the central bank has kept interest rates ply negative in real terms, encouraging workers to spend their wages rather than to save.

Argentina’s economy began its recovery in 2002. According to the text, which of the following is not the reason（）

A. Low wages

B. Low unemployment

C. Low value of currency

D. Low commodities prices of exports