滥用违禁药物的概念是什么？简述兴奋剂对运动员的危害。

《咬文嚼字》、《散文创作谈》的文体是（）

A．杂文

B．驳论文

C．讲话

D．文艺专论

关于骨关节的描述下列哪项是错误的（）

A.关节软骨在X线平片上不显影

B.小儿长骨两端的骨骺为二次骨化中心

C.X线平片上小儿长骨的骺板软骨表现为小点状骨性致密影

D.儿童的关节间隙在X线平片上显得较宽

E.骺端为骨骺线未闭合前的长骨的构成部分

某工业项目建设期3年，生产期17年，占用水稻耕地2000亩，占用前3年每亩的平均产量为0.5吨，每吨收购价400元，出口口岸价预计每吨180美元，从产地至口岸运距500公里。该地区的水稻年产量以4%的速度递增，社会折现率取10%，水稻生产成本(调价后)按收购价格的40%计算。影子汇率为4元/美元，贸易费用按6%。

在国民经济评价中净效益现值能否计入项目固定资产投资如果能，其价值为多少

管制权的主体是乡、镇级以上人民政府的公安机关。( )

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.

43（）

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.