现在越来越多的学生骑电动车(motor bicycle)上学，请结合所给内容谈谈_爱下问搜题

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问题写作题

现在越来越多的学生骑电动车(motor bicycle)上学，请结合所给内容谈谈自己的看法。

内容要点：1、有很多优点，如方便省时；

2、但是价格比自行车贵得多，有的人骑得太快、不走自行车道（cycle way）会造成事故；

3、应该尽量步行或骑自行车上学。与骑电动自行车相比，更有助于省钱，安全，保持健康，还有益于保护环境。

注意：1.不要逐词逐句地翻译。2.为使语句连贯，可以适当增加细节。

3.词数100左右。开头已给出。

Nowadays, more and more students go to school by motor bicycle. ____________________

答案

Nowadays, more and more students go to school by motor bicycle. There are many advantages of riding a motor bicycle, for example, it is convenient and saves time. However, a motor bicycle costs much more than a bike. Besides, some students always ride too fast and sometimes they do not ride on the cycleway, which leads to many accidents.

In my opinion, we’ better walk or cycle to school. Compared with riding a motor bicycle, it will help to save more money and make us safer. By doing so, we can take regular exercise, which will keep us fit. Besides, it will be kinder to the environment.

本文是一篇表达观点的文章，要点都已经给出。在写作时候要注意选择较高级的词汇如Compared with，convenient等，适当再使用较高级的句型和合适的连词如Besides等让文章更流畅。

单项选择题 A1型题

下列病因中，不是奶牛酮病的病因是（）

A.饲草料单一、干草缺乏

B.高产奶牛发病率较高

C.缺乏运动

D.奶牛过肥

E.饲喂的草料中糖类物质过多

单项选择题

Set 2

Mediterranean Diet
The Mediterranean diet is based upon the eating patterns of traditional cultures in the Mediterranean region. Several noted nutritionists and research projects have concluded that this diet is one of the most healthful in the world in terms of preventing such illnesses as heart disease and cancer, and increasing life expectancy.
The countries that have inspired the Mediterranean diet all surround the Mediterranean Sea. These cultures have eating habits that developed over thousands of years. In Europe, parts of Italy, Greece, Portugal, Spain, and southern France adhere to principles of the Mediterranean diet, as do Morocco and Tunisia in North Africa. Parts of the Balkan region and Turkey follow the diet, as well as Middle Eastern countries like Lebanon and Syria. The Mediterranean region is warm and sunny, and produces large supplies of fresh fruits and vegetables almost year round that people eat many times per day. Wine, bread, olive oil, nuts, and legumes are other staples of the region, and the Mediterranean Sea has historically yielded abundant quantities of fish.
International interest in the therapeutic qualities of the Mediterranean diet began back in the late 1950s, when medical researchers started to link the occurrence of heart disease with diet.

Dr. Ancel Keys performed an epidemiological analysis of diets around the world (epidemiology being the branch of public health that studies patterns of diseases and their potential causes among populations).

Entitled the Seven Countries Study, it is considered as one of the greatest studies of its kind ever performed. In it, Keys gathered data on heart disease and its potential causes from nearly 13,000 men in Greece, Italy, Croatia, Serbia, Japan, Finland, the Netherlands, and the United States.

it concluded that the Mediterranean people in the study enjoyed some significant health advantages. The Mediterranean groups had lower mortality rates in all age brackets and from all causes, particularly from heart disease. The study also showed that the Mediterranean diet is as high or higher in fat than other diets, obtaining up to 40 percent of all its calories from fat. It has, however, different patterns of fat intake. Mediterranean cooking uses smaller amounts of saturated fat and higher amounts of unsaturated fat, mostly in the form of olive oil. Saturated fats are fats that are found principally in meat and dairy products, although avocados, some nuts, and some vegetable oils also contain them. Saturated fats are used by the body to make cholesterol, and high levels of cholesterol have since been directly related to heart disease.
Several other studies have validated Keys’ findings regarding the good health to people in Mediterranean countries. The World Health Organization (WHO) showed in a 1990 analysis that four major Mediterranean countries (Spain, Greece, France, and Italy) have longer life expectancies and lower rates of heart disease and cancer than other European countries and America. The data are significant because the same Mediterraneans frequently smoke and don’t have regular exercise programs like many Americans, which means that other variables may be responsible. Scientists have also ruled out genetic differences, because Mediterraneans who move to other countries tend to lose their health advantages. These findings suggest that diet and lifestyle are major factors.
The Mediterranean diet gained even more notice when Dr. Walter Willett, head of the nutrition department at Harvard University, began to recommend it. Although low-fat diets were recommended for sufferers of heart disease, group of Mediterraneans in his studies had very high intakes of fat, mainly from olive oil. Willett and others proposed that the risk of heart disease can be reduced by increasing one type of dietary fat--monounsaturated fat--the type found in olive oil. Willett’s proposal went against conventional nutritional recommendations to reduce all fat in the diet. It has been shown that unsaturated fats raise the level of HDL cholesterol, which is sometimes called "good cholesterol" because of its protective effect against heart disease. Willett has also performed studies correlating the intake of meat with heart disease and cancer.

According to medical studies, what affect the risk of heart disease and cancer

A．Smoking and exercise.

B．Genetic differences.

C．Diet and lifestyle.

D．Conventional nutrition.