All of us eat every day, but most of us don't understand nutrition. We often make mistakes in talking about good diet.

　　For example, many people think that foods, such as rice, bread and potatoes, will make one grow fat. In fact, those foods are very good to one's health. They are good sources of many vitamins. And in comparison with steak（肉排）and beef, they contain less amount of calories.

　　Some people don't like canned or frozen vegetables, because they think fresh vegetables cooked at home are always better. This is again wrong. In fact, whether the vegetables are good or not depends more on how they are prepared. Overcooking, for example, destroys many good qualities. Vegetables cooked in too much water can lose a large amount of vitamins.

　　It is widely believed that extra vitamins provide more energy. But taking more than the body needs doesn't make it function, better.

　　It is also wrong to say that vegetables grown in poor, worn-out soil are lower in vitamins than vegetables grown in rich soil. The vitamins in our foods are in the plants themselves. However the minerals in a plant depend on the minerals in the soil.

　　In short, there are many false ideas about nutrition. We need to correct them.

(1) This passage is mainly about ________.

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(2) Rice, bread and potatoes do good to people's health because ________.

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A．they make people fat

B．there are a lot of vitamins in them

C．they contain less amount of calories compared with steak and beef

D．both B and C

(3) Why don't some people like canned or frozen vegetables? Because ________.

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A．they think fresh vegetables contain less vitamins

B．they think fresh vegetables contain more vitamins than the canned or frozen ones

C．they don't think the canned or frozen vegetables are fresh

D．they don't think the canned or frozen vegetables taste as good as the fresh ones

(4) Which of the following is true according to the passage？

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A．Many people know almost everything about nutrition.

B．Food, such as rice, bread and potatoes, makes people fat.

C．Vegetables grown in poor, worn-out soil may have the same amount of vitamins as vegetables grown in rich soil.

D．Extra vitamins provide less energy.

(5) The point of the passage is that ________.

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A．the minerals in a plant depend on the minerals in the soil

B．people make mistakes when talking about good diet

C．taking more vitamins than the body needs doesn't make it function better

D．vegetables cooked in too much water can lose a large amount of vitamins

To many students, joining social media (社交媒体) “circles” is now more important than making new friends in real life.
And it’s easy. If you have a cell phone, you can download apps (应用程序) such as Sina Weibo, WeChat (微信) and QQ.
“I love to check my friends’ updates (更新). I also enjoy news and humor shared on social media,” Said Ou Wei, 14, from Hongling Middle School in Shenzhen. Because of enjoying these, Ou distances himself from real life. “I love playing the plane-shooting game on WeChat, but have no interest in playing flying chess with my classmates,” said Ou.
Deng Yunyun, 14, from Jianfeng Middle School in Shanghai, said that social media had influenced their life. Recently his school held a basketball match, and a student hurt his leg. Instead of giving him some help, students were busy with updating micro blogs about the accident.
“I think they need to learn to balance their real and online lives,” said Deng,
What makes parents and teachers worried is safety. “Many students are happy to tell their interests and personal information to their social media “friends”. Such information could bring them danger,” said Han Songjun, a teacher at Hongling Middle School.
For example, WeChat’s shake-shake function allows users to connect to other users close by. But the police warn about the danger of socializing in this way.
“Be careful. Do not use the locating (定位) function in any app, do not give your name, and do not post the photos of your residential area (小区),” said the police.
【小题1】 What is the possible meaning of the underlined word “distances” in Paragraph 3?