下列哪一种药物最常用于焦虑症的治疗 A．氟哌啶醇 B．碳酸锂 C．安定 D．五氟利多

In the summer of 1978 an English man named Steven was driving his tractor through a field of wheat when he discovered something strange. Some of his wheat was lying on the ground. The flattened wheat formed(形成)a circle about six meters across . Around this circle were four smaller circles of flattened wheat.

　 Three years later a farmer who lived nearby discovered almost the same circles in one of his fields. These circles were larger—nearly 15 meters across . That same year , another English farmer discovered three circles of flattened wheat on his land—one large circle between two small circles. During the following years, farmers in England found circles in their fields more and more often.

　 The circles are called “crop circles” because they usually appear in fields of wheat or corn. The wheat in the circles lies on the ground but is never broken; it keeps on growing, and the farmers can later harvest it. Farmers always discover the crop circles in the morning, so the circles probably form at night. They appear only in the months from May to September. What causes the crop circles?

　 At first, people thought that some kids were making them as a joke, or that farmers were making them to attract tourists.(In fact, in 1991, two men said they made the circles themselves, but many scientists don’t believe them.) People tried to copy them: They tried to make circles exactly like the ones the farmers had found. They couldn’t do it. They couldn’t enter a field of wheat without leaving tracks, and they couldn’t flatten the wheat without breaking it.

　 Several times people reported seeing stranger objects near the fields where crop circles later appeared. Many people believe that these crop circles are the messages sent by living things from outer space(外层空间)or the marks left by their spaceships.

　 Scientists who have studied the crop circles try to find out what causes them. In the summer of 1990 some scientists spent three weeks in the part of England where many circles have appeared. They had all the latest high-tech equipment(最新高科技设备). The equipment—worth 1.8 million dollars—got nothing. But one night, as the scientists were watching a field, crop circles formed in the field behind them, which were quite different from the others. The scientists had neither seen nor heard anything.

　 When Steven discovered the crop circles on his land in 1978, he said, “It was just like something that had landed in the field from the air and gone back up again. I don’t know what to make of these things.”

　 Crop circles have appeared in England, Japan, the United States and Russia. Experts from all over the world have studied them, and they say what Steven said: They don’t know what to make of these things.

小题1:Which picture is probably the one formed in the field behind the scientists?

小题2:“Flattened wheat” means ___________.

A．broken wheat

B．lying wheat

C．harvested wheat

D．growing wheat小题3:The passage is mainly about something ___________ .

A．that is done by living things from outer space

B．that cannot be solved but found all around the world

C．that cannot be made clear or understood

D．that is discovered and copied by the farmers

柏拉图说：“惊讶，这尤其是哲学家的一种情绪。除此之外，哲学没有别的开端。”这表明                                                （   ）

A．哲学来源于社会生活又指导着社会生活

B．哲学源于人们对实践的追问和对世界的思考

C．哲学是对自然、社会和思维知识的概括总结

D．哲学是指导人们生活得更好的艺术

慢性心房颤动伴快速心室率，首选治疗措施是（）。

A.药物复律，使之恢复为窦性节律

B.积极治疗，预防栓塞并发症

C.减慢心室率，使心室率控制在60～80次／分，活动后心室率加快不超过100次／分

D.积极治疗原发病

E.控制诱发因素

下列关于企业规模的说法错误的是（）

A.企业规模有小型、中型、大型和特大型之分

B.大型和特大型企业要获得规模效益，普遍要求建立分权型组织系统

C.小型企业组织简单，通常实行直线式管理，集权程度较高

D.大型企业适宜集权和分权相结合，以分权为主