人类对地球形状的认识，经历了漫长的过程。下列能够证实地球是球体事件是： A．魏格

为了更好地揭示人体生理功能的调节机制，科学家经常用青蛙、大白鼠、猴等实验动物进行科学实验。请根据下列相关实验回答问题：

(1)科研人员分别给三只大白鼠注射了A、B、C三种激素后，观察到的相应反应是：A可引起低血糖，甚至昏迷；B促进蛋白质的合成，并使软骨生长明显；C使呼吸、心率加快，体内产热量增加，行为亢奋。据此判断激素A、B、C的化学名称依次是___________。将正常大白鼠从室温移至低温环境中，其血糖浓度会升高，原因是在低温刺激下，下丘脑通过相关神经促进____的分泌，进而主要促进__________，使血糖升高。

(2)用去除脑但保留脊髓的蛙(简称脊蛙)为材料，进行脊蛙反射实验。实验前将蛙头部剪去，其目的是__________________。将浸有0.5%硫酸溶液的小纸片贴在脊蛙右后肢下端的皮肤上，可看到________现象，在此反射活动中，兴奋以__________形式从上一个神经元传到下一个神经元。若破坏蛙的脊髓，再重复上述实验操作，上述实验现象不出现，其原因是____________。

(3)下图为用猴进行的科学实验，实验中头部电极刺激大脑皮层某区域引起猴右手运动。在此反应过程中建立的突触结构类型有神经一神经突触和_____突触，兴奋在后一突触处传导的机理及效应是________。

Scientific experiments can sometimes go wrong and when they do the results may range from the disastrous to the troubling. One such experiment took place in South America about fifty years ago. Whether its final consequences will cause serious damage or nothing more than a small trouble still remains to be seen.

The story began in 1956 when an American scientist working in Brazil decided to solve the problem of increasing the productivity of that country’s bees. He imported a very active type of African bee from Tanzania and mated (交配)it with the more easy-going native variety to produce a new kind of bees. The new bees worked harder and produced twice as much honey. It seemed that Professor Kerr, for that was the scientist's name, had a total success on his hands.

Then things began to go wrong. For some reason as yet unseen, but perhaps as a result of something in their environment, the new bees began to develop extremely attacking personalities. They became bad-tempered and easy to be angry, attacked the native bees and drove them from their living places.

But worse was to follow. Having taken over the countryside, the new bees, with their dangerous stings (叮) , began to attack its neighbors -- cats, dogs, horses, chickens and finally man himself. A long period of terror began that has so far killed a great number of animals and about 150 human beings.

This would have been bad enough if the bees had stayed in Brazil. But now they are on the move, heading northwards in countless millions towards Central and North America, and moving at the alarming speed of 200 miles a year. The countries that lie in their path are naturally worried because it looks as if nothing can be done to stop them.

小题1: The results of the South American experiment         .

A．are not yet certain

B．have proved to be wrong

C．have caused a serious trouble

D．are not important小题2: The experiment mentioned in this passage was designed to             .

A．make African bees less active

B．make Brazilian bees more easy-going

C．increase the number of bees in Brazil

D．increase the amount of honey in Brazil小题3: Which of the following may be the cause of the new bees' attacking personalities?

A．Their production of honey.

B．Their living environment.

C．Their hard work.

D．Their bad temper.小题4: The last paragraph implies that            .

A．the bees have been driven to Central and North America

B．the bees must be stopped from moving north

C．the bees may bring about trouble in more countries

D．the bees prefer to live in Brazil

关于党的群众路线的内容，下列论述错误的是( )。

A．一切为了群众
B．一切依靠群众
C．从群众中来，到群众中去
D．教育和引导群众

原核生物参与转录起始的酶是（）。

A．RNA聚合酶全酶

B．RNA聚合酶核心酶

C．引物酶

D．解链酶

E．RNA聚合酶Ⅱ

治疗霍乱的首选药物是

A．复方磺胺甲基异恶唑
B．痢特灵
C．四环素
D．土霉素
E．庆大霉素