先天性主动脉瓣狭窄患者出现杂音的部位及时期为（） A.心尖区收缩期杂音 B.心尖区舒

关于电化学发光免疫分析，下列描述中错误的是（）。

A.是一种在电极表面由电化学引发的特异性化学发光反应

B.包括了电化学反应和光致发光两个过程

C.化学发光剂主要是三联吡啶钌

D.检测方法主要有双抗体夹心法、固相抗原竞争法等模式

E.以磁性微珠作为分离载体

One might expect that the ever-growing demands of the tourist trade would bring nothing but good for the countries that receive the holiday-makers. Indeed, a rosy picture is painted for the long-term future of the holiday industry. Every month sees the building of a new hotel somewhere, and every month another rock-bound Pacific island is advertised as the 'last paradise(天堂) on earth'.

However, the scale and speed of this growth seem set to destroy the very things tourists want to enjoy. In those countries where there was a rush to make quick money out of sea-side holidays, over-crowded beaches and the concrete jungles of endless hotels have begun to lose their appeal.

Those countries with little experience of tourism can suffer most. In recent years, Nepal set out to attract foreign visitors to fund developments in health and education. Its forests, full of wildlife and rare flowers, were offered to tourists as one more untouched paradise. In fact, the nature all too soon felt the effects of thousands of holiday-makers traveling through the forest land. Ancient tacks became major routes for the walkers, with the consequent exploitation of precious trees and plants.

Not only can the environment of a country suffer from the sudden growth of tourism. The people as well rapidly feel its effects. Farmland makes way for hotels, roads and airports; the old way of life goes. The one-time farmer is now the servant of some multi-national organization; he is no longer his own master. Once it was his back that bore the pain; now it is his smile that is exploited. No doubt he wonders whether he wasn't happier in his village working his own land.

Thankfully, the tourist industry is waking up to the responsibilities it has towards those countries that receive its customers. The protection of wildlife and the creation of national parks go hand in hand with tourist development and in fact obtain financial support from tourist companies. At the same time, tourists are being encouraged to respect not only the countryside they visit but also its people.

The way tourism is handled in the next ten years will decide its fate and that of the countries we all want to visit. Their needs and problems are more important than those of the tourist companies. Increased understanding in planning world-wide tourism can preserve the market for these companies. If not, in a few years’ time the very things that attract tourists now may well have been destroyed.

小题1:What does the author indicate in the last sentence of Paragraph 1?

A．The Pacific Island is a paradise.

B．The Pacific Island is worth visiting.

C．The advertisement is not convincing.

D．The advertisement is not impressive小题2:The example of Nepal is used to suggest _________.

A．its natural resources are untouched

B．its forests are exploited for farmland

C．it develops well in health and education

D．it suffers from the heavy flow of tourists.小题3:What can we learn about the farmers from Paragraph 4?

A．They are happy to work their own lands.

B．They have to please the tourists for a living.

C．They have to struggle for their independence.

D．They are proud of working in multi-national organizations.小题4:Which of the following determines the future of tourism?

A．The number of tourists

B．The improvement of services.

C．The promotion of new products.

D．The management of tourism小题5:The author’s attitude towards the development of the tourist industry is __________.

A．optimistic

B．doubtful

C．objective

D．negative

根据出入境事由，签证可分为移民签证、非移民签证、留学签证、旅游签证、工作签证、商务签证和家属签证等。

悬空式桥体与黏膜的关系是（）

A.与黏膜面状接触

B.离开黏膜Imm

C.离开黏膜2mm

D.离开黏膜3mm

E.离开黏膜3mm以上

In old days, when a glimpse of stocking was looked upon as something far too shocking to distract the serious work of an office, secretaries were men.

Then came the first World War and the male secretaries were replaced by women. A man’s secretary became his personal servant, charged with remembering his wife’s birthday and buying her presents; taking his suits to the dry cleaners; telling lies on the telephone to keep people he did not wish to speak to at bay and, of course, typing and filing and taking shorthand.

Now all this may be changing again. The microchip and high technology is sweeping the British office, taking with it much of the routine clerical work that secretaries did.

"Once office technology takes over generally, the status of the job will rise again because it will involve only the high-powered work-and then men will want to do it again."

That was said by one of the executives(male) of one of the biggest secretarial agencies in this country. What he has predicted is already under way in the US. One girl described to me a recent temporary job placing men in secretarial jobs in San Francisco. She noted that all the men she dealt with appeared to be gay so possibly that is just a new twist to the old story.

Over here, though, there are men coming onto the job market as secretaries. Classically, girls have learned shorthand and typing and gone into a company to seek their fortune from the bottom——and that’s what happened to John Bowman. Although he joined a national grocery chain as secretary to its first woman senior manager, he has since been promoted to an administration job.

"I filled in the application form and said I could do audio/typing, and in fact I was the only applicant. The girls were reluctant to work for this young, glamorous new woman with all this power in the firm. "

"I did typing at school, and then a commercial course. I just thought it would be useful finding a job. I never got any funny treatment from the girls, though I admit I’ve never met another male secretary. But then I joined the Post Office as a clerk and carelessly played with the typewriter, and wrote letters, and thought that after all secretaries were getting a good ￡1,000 a year more than clerks like me. There was a shortage at that time, you see. "

"It was simpler working for a woman than for a man. I found she made decisions, she told everybody what she thought, and there was none of that stuff’ ring this number for me dear, which men go in for."

"Don’t forget, we were a team—that’s how I about it—not boss and servant but two people doing different things for the same purpose."

Once high technology has made the job of secretary less routine, will there be male takeover Men should beware of thinking that they can walk right into the better jobs. There are a lot of women secretaries who will do the job as well as they because they are as efficient and well trained to cope with word processors and computers, and men.

John Bowman was given his first job as a secretary because（）

A. he was lucky

B. no one else applied

C. he had the best qualifications

D. he wanted to work for a woman