土地利用管理

Willis环使两侧大脑半球及一侧大脑半球的前后部分有充分的侧支循环，该环的构成不含有（）

A.大脑前动脉

B.大脑后动脉

C.颈内动脉

D.前交通动脉

E.眼动脉

(91～93题共用题干)女性，46岁，有慢性咳嗽，咳痰史10余年，6年来活动后气短，2周来上述症状加重，并出现全身水肿，卫生院医生给了大量利尿剂，速尿 (呋塞米)40mg，每日1次静注，全身水肿迅速消退，在治疗第4天出现烦躁，抽搐。查体：神志不清，桶胸，双肺散在干湿啰音，剑突下触及心脏收缩期搏动，肝触及，下肢无水肿，心电右心室肥厚。

该患者应立即给的药物是

A．呼吸兴奋剂

B．大量抗生素

C．继续用利尿剂

D．补充氯化钾

与T细胞表面CD8分子结合的部位是

A．HLA-Ⅰ类分子轻链β₂m
B．HLA-Ⅰ类分子α₂和α₃结构域
C．HLA-Ⅱ类分子α₁和β₁结构域
D．HLA-Ⅰ类分子α₃结构域
E．HLA-Ⅱ类分子β₂结构域

狭义的信息资源指的是（）。

A、信息设备

B、信息网络

C、信息系统

D、信息的本身

Almost every day we see something in the papers about the latest exciting developments in the space race. Photographs are regularly flashed to the earth from thousands and even millions of miles away. They are printed in our newspapers and shown on our television screens as a visible proof of the man’s newest achievements. The photographs neatly sum up the results of these massive efforts to ’ conquer space’ and at the same time they exposed the absurdity of the undertaking. All we can see is an indistinguishable blob that is supposed to represent a planet seen from several thousand miles away. We are going to end up with a little moon-dust and a few stones which will be put behind glass in some museum. (41)__________

(42)__________It is just an extension of the race for power on earth. Only the wealthiest nations can compete and they do so in the name of pure scientific research. But in reality, all they are interested in is power and prestige. They want to impress us, their spectators, with a magnificent show of strength. Man has played the power game ever since he appeared on earth. Now he is playing it as it has never been played before. The space race is just another aspect of the age-old argument that "might is right".

(43)__________But what has the space race done to relieve the suffering of the earth’s starving millions In what way has it raised the standard of living of any one of us As far as the layman is concerned, the practical results of all this expenditure of money and efforts are negligible. Thanks to space research, we can now see television pictures transmitted live halfway across the globe and the housewife can use non-stick frying pans in the kitchen. The whole thing becomes utterly absurd when you think that no matter what problems man overcomes, it is unlikely that he will ever be able to travel even to the nearest star.

(44)__________For the first time in his history, man has the overwhelming technological resources to combat human suffering, yet he squanders them on meaningless pursuits.

(45)__________Individuals with limited budgets usually get their priorities right; they provide themselves with necessities before trying to obtain luxuries. Why can’t great nations act in the same sensible way Let us put our house in order first and let space look after itself.

42（）

A.An increasing number of people even begin to picture a space travel in recent years.

B.Poverty, hunger, disease and war are man’s greatest enemies and the world would be an infinitely better place if the powerful nations devoted half as much money and effort to these problems as they do to the space race.

C.The space race is not simply the objective search for knowledge though it is often made out to be.

D.On the other hand, people benefit dramatically from the development of science and technology.

E.This is hardly value for money when you think that our own earth can provide countless sights that are infinitely more exciting and spectacular.

F.We are often told that technological know-how, acquired in attempting to get us into orbit, will be utilized to make better on earth.

G.If a man deprived himself and his family of food in order to buy and run a car, we would consider him mad.