If you go to fast food restaurant, you can see a lot of teenagers. Today,1teenagers are  2 because of their favorite food. Most teenagers 3junk food 4 a lot of fat, salt and sugar.

    5 bad eating habits are more than junk food. We find many teenagers eat6 Some don't have 7 before they go to school. During the day, some don't 8a proper meal for lunch. In a survey 9 one school, scientists found that over 65% of the students didn't have 10 healthy diet.

    Parents today also 11 about their children's diet. Some doctors give the following 12

    Teenagers shouldn't eat 13 junk food .Teenagers shouldn't eat food with much14 Salt can cause high blood pressure in the future.

Teenagers should eat food without much fat, oil and sugar.

    Teenagers15 to eat some fruits and vegetables every day. Fruits and vegetables are rich in vitamins and they have little fat.

人类从鸟类飞行得到启示发明了飞机，从鱼类游泳得到启示发明了潜艇．某大学两位研究生从蚂蚁身上得到启示，设计出“都市蚂蚁”概念车（如图所示）质量是360kg，乘载两人的总质量为140kg．这款概念车小巧实用，有利于缓解城市交通拥堵．（g取10N/kg）

按要求填空。