对狂犬病患者的正确治疗原则是（） A.用大剂量丙种球蛋白及抗菌药物 B.立即接种

男性，5岁，双眼平视前方时上睑缘位于瞳孔上缘的稍下方。查体：上直肌功能正常，上睑缘上提的幅度6mm。

术后注意事项最重要的是（）。

A.服用抗生素

B.加压包扎

C.坚持用眼膏及眼药水预防暴露性结膜炎

D.卧床休息

E.理疗

可引起肝脏周边性脂肪变性的是（）

A.慢性肝淤血

B.四氯化碳中毒

C.缺氧

D.有机磷中毒

E.氯仿中毒

双块式无碴轨道轨枕间距为（）mm

A、450

B、500

C、650

D、700

英国东部伊普斯威奇市的英国电信公司实验室的科学家称，由于人脑中神经元的大小和数量与为它们服务的血管之间存在微妙的平衡关系，因此根本的改善是不可能的。
最能准确复述这段话主要意思的是( )。

A．人脑中的神经元不可能变大变多

B．脑血管不可能变粗变强

C．人脑的神经元和血管不可能单方面改善

D．人脑的神经元和血管不可能共同有大的改善

The day was star-crossed: Friday the 13th in the month of October, on the eve of the second looming anniversary of a devastating market crash. "I’m telling you, psychology is really funny. People get crazy in situations like that," said portfolio strategist Elaine Garzarelli. Last week Friday the 13th lived up to its frightful reputation. After drifting lower at a sleepy pace for most of the day, the Dow Jones industrial average abruptly lurched into a hair-raising sky dive in the final hour of trading.

The Bush Administration moved swiftly to avert any sense of crisis after the market closed. Declared Treasury Secretary Nicholas Brady: "It’s important to recognize that today’s stock market decline doesn’t signal any fundamental change in the condition of the economy. The economy remains well balanced, and the outlook is for continued moderate growth." But Massachusetts Democrat Edward Markey, who chairs a House subcommittee on telecommunications and finance, vowed to hold hearings this week on the stock market slide. Said he: "This is the second heart attack. My hope is that before we have the inevitable third heart attack, we pay attention to these problems."

Experts found no shortage of culprits to blame for the latest shipwreck. A series of downbeat realizations converged on Friday, ranging from signs of a new burst of inflation to sagging corporate profits to troubles in the junk-bond market that has fueled major takeovers. The singular event that shook investors was the faltering of a $6.75 billion labor management buyout of UAL, the parent company of United Airlines, the second largest U. S. carrier.

On one point most thoughtful Wall Streeters agreed: the market had reached such dizzying heights that a correction of some sort seemed almost inevitable. Propelled by favorable economic news and a wave of multibillion-dollar takeovers, stocks had soared more than 1,000 points since the 1987 crash. But by last August some Wall streeters were clearly worried.

The heaviest blow to the market came Friday afternoon. In a three-paragraph statement, UAL said a labor-management group headed by Chairman Stephen Wolf had failed to get enough financing to acquire United. Several banks had apparently balked at the deal, which was to be partly financed through junk bonds. The take-over group said it would submit a revised bid "in the near term,’ but the announcement stunned investors who had come to view the United deal as the latest sure thing in the 1980s buyout binge. Said John Downey, a trader at the Chicago Board Options Exchange: "The airline stocks have looked like attractive takeover targets. But with the United deal in trouble, everyone started to wonder what other deals might not go through.

When mentioning "the latest shipwreck" (Para. 3), the author is talking about（）

A. stock-market decline

B.junk-bond market

C. enormous acquisitions

D. corporate profits