对待文化差异的正确态度是 [] A、高度重视本民族文化价值 B、多学习其他国家文

以下三个小题基于如下供应商关系S和零件关系P。它们的主码分别是“供应商号”和“零件号”，而且，零件关系P的属性“颜色”只能取值为（红，白，蓝）。供应商关系S：零件关系P：供应商号 供应商名 所在城市 零件号 颜色供应商号100红星 北京 A110 红 100200宇宙 上海 B201 蓝 300300黎明 天津 C312 白 200400立新 重庆

对关系S和P执行下列哪一种关系代数操作，会得到如下的结果关系？供应商号供应商名 所在城市 零件号颜色100 红星北京 A110 红200 宇宙上海 C312 白300 黎明天津 B201 蓝

A．S P

B．S P

C．S P

D．S P

Excel是一个什么应用软件？（）

A.数据库

B.电子表格

C.文字处理

D.图形处理

2005年8月15日，海峡两岸佛道界举办法会，公祭抗日英灵，祈祷世界和平。这从政治常识角度说明了（  ）

①宗教已经与社会主义相适应　②和平与发展是当今世界的两大主题　③宗教组织已经成为共同致力于社会主义建设的爱国组织　④纪念昨天，是为了更好地展望明天

A．①②

B．②④

C．①④

D．③④

在消费者行为中，消费者的介入程度是指消费者（）。

A．在购买过程中的参与程度

B．购买金额的大小

C．购买场所的类型

D．对某一品牌的忠诚度

If there is one thing scientists have to hear, it is that the game is over. Raised on the belief of an endless voyage of discovery, they recoil from the suggestion that most of the best things have already been located. If they have, today’s scientists can hope to contribute no more than a few grace notes to the symphony of science.

A book to be published in Britain this week, The End of Science, argues persuasively that this is the case. Its author, John Horgan, is a senior writer for Scientific American magazine, who has interviewed many of today’s leading scientists and science philosophers. The shock of realizing that science might be over came to him, he says, when he was talking to Oxford mathematician and physicist Sir Roger Penrose.

The End of Science provoked a wave of denunciation in the United States last year. "The reaction has been one of complete shock and disbelief, "Mr. Horgan says.

The real question is whether any remaining unsolved problems, of which there are plenty, lend themselves to universal solutions. If they do not, then the focus of scientific discovery is already narrowing. Since the triumphs of the 1960s—the genetic code, plate tectonics, and the microwave background radiation that went a long way towards proving the Big Bang—genuine scientific revolutions have been scarce. More scientists are now alive, spending more money on research, that ever. Yet most of the great discoveries of the 19th and 20th centuries were made before the appearance of state sponsorship, when the scientific enterprise was a fraction of its present size.

Were the scientists who made these discoveries brighter than today’s That seems unlikely. A far more reasonable explanation is that fundamental science has already entered a period of diminished returns. "Look, don’t get me wrong," says Mr Horgan. "There are lots of important things still to study, and applied science and engineering can go on for ever. I hope we get a cure for cancer, and for mental disease, though there are few real signs of progress.

There have not been many genuine scientific revolutions in the past few decades because（）

A. there have been decreased returns in the research of fundamental science

B. there are too many important things for scientists to study

C. applied science and engineering take up too much time and energy

D. today’s scientists are not as intelligent as those in the past