下图为人口自然增长和迁移差额率示意图，据此回答4一5题。
（人口迁移差额率=迁入人口-迁出人口）
小题1:如果说图中a～d表示不同的国家，则下面几组排列中，最可能的是
A．美国、日本、丹麦、加拿大
B．中国、埃及、巴西、新西兰
C．沙特阿拉伯、加拿大、德国、埃塞俄比亚
D．印度、尼日利亚、南非、英国小题2:如果上图中各点表示国内人口迁移的规律，则反映美国东北部在20世纪60年代至70年代人口迁移的是
A．a
B．b
C．c
D．e
小题1:C
小题2:D
小题1:根据c的人口自然增长率为负值即可得知答案为C。
小题2:图中字母c为负自然增长率，各选项中排列第3位的国家只有德国符合此特征，所以选C。20世纪60年代到70年代。美国东部人口大量迁往西部、南部的阳光地带，同时作为发达国家，美国的人口自然增长率较低。
| Directions: Read the following text and choose the most suitable heading from A-F for each paragraph. There is one extra heading which you do not need. | |
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| 1.______ The causes of eating disorders are not clear. There may be genetic or biochemical factors in some cases. There may be psychological problems from early childhood or the present (such as school or family conflicts) that trigger the problem. Often, there is the double pressure to enjoy life through food and yet remain ultra-slim. Society all around us encourages eating and drinking as main ways to enjoy life. To be popular, you are supposed to eat. 2.______ But in real life most people, if they keep consuming like that, just keep pulling on more and more weight. They then find themselves in conflict with another dominant pressure in society-to stay slim and trim. Models in ads, even those shown earring fairy foods, are usually physically lit and quite thin. All of these pressures put teens in a terrible situation. The "solution" that some teens choose is to deny themselves all the time so as to keep temptation away. But soon, hunger and food boredom lead to overeating. Over time they develop anorexia or ballerina. 3.______ Once an earring disorder has become firmly established, there is no easy cure. Someone who's never suffered anorexia and never known an anorexic might be tempted to think. "It's simple-just tell them to eat more!" Unfortunately, it's not that simple. Even when anorexics have been brought into the hospital and arc receiving physical care, nutritional therapy, and psychiatric care, many don't improve much. 4.______ Our society's obsession with thinness, together with a constant emphasis on the theme that rich food means pleasure, puts many teens in a difficult situation. Being drawn to overeating on the one hand and self-denial on the other can bring about anorexia or bulimia-or both. Anorexics seem to feel that no matter how much weight they lose, they are still too fat Therefore, it is important for each person in our society to try to maintain a health y and realistic self-image. Don't compare yourself with the models and actors in the media Set your sights more realistically by comparing yourself with family and friends, if anyone. 5.______ Self-denial is the typical first step toward an caring disorder. Eventually, desires for what you've denied yourself become unbearable, and you react with either a binge or overly fierce self-control. The answer is not of course. 10 eat all the snacks and traces you fancy. But 10 avoid that first step that leads to overeating, strive for a good and healthy diet. Such a diet is based primarily on grain products, fruits, and vegetables, with moderate amounts of meat and dairy products and with small amounts of snacks and desserts. Research demonstrates that miss kind of diet leaves you more alert and energetic. |