Today there are 6.4 billion people on the earth. By the year 2050 there may be 12.5 billion . There are a lot of people to feed. We need more and more food.
One way to produce more food is growing stronger plants. For thousands of years, farmers have made plants better. Every season, they pick the best plants for the next season. It works very slowly. Since 1983, scientists have been able to change plants more quickly by changing their genetic（遺傳的） material. Foods from plants grown in this way are called genetically modified(改變的) foods, or GM foods.
By changing the genetic material of a plant, it is possible to make new plants. They make plants which are strong against plant diseases. They can also help in our diseases; a kind of rice is being prepared , for example , which stops people becoming blind.
Rich countries produce GM foods because they are easy to grow and bring in more money. Poor countries are interested in them because they help produce more food.
GM plants are not natural. No one knows how good or bad they are,. Making GM foods is only one way of feeding people in 2050. There are strong feelings against them, because they are unnatural. They may feed people , then hurt them or their children later. But both rich and poor countries are interested in their use, and they are not going to go away. In 2050, we may think differently about them.
小題1:GM foods are made by
A. farmers B. workers C. scientists D plants
小題2:What are the good things about GM foods ?
A. They make plants strong against diseases. B. They are unnatural.
C. They can help in human diseases. D Both A and C.
小題3:GM foods
.
A. are a quick way to produce food B. grow in the wild
C. are safe D are grown only in rich countries
小題4:Why do some people not like GM foods?
A. They are not useful. B. They are not helpful.
C. They are not natural. D They are not cheap.
小題5:From the passage we know that
.
| A．GM foods will disappear one day in the future |
| B．GM foods will not disappear in the future |
| C．People will not be interested in GM foods. |
| D．People will have to stop using GM foods |
天天向上一本好卷系列答案
小學(xué)生10分鐘應(yīng)用題系列答案
MSG(monosodium glutamate) is a food additive(食品添加劑),which has been widely used by many food factories all over the world since it appeared first in Japan in 1909.
neurological disorders(神經(jīng)紊亂).In mice studies done by a university, the evidence showed the mice didn’t want to eat the food including MSG.
nt names. If you see “natural flavorings”,“hydrolyzed protein”and “spices” in a food label, you are probably seeing a hidden way to “report” MSG in a food label. Every time we have a meal in a restaurant, we always feel the food very delicious to taste, but sometimes it is dangerous for our health because some poisonous food additives have been added to the food.
our governments, from central to local, are taking actions to stop factories producing poisonous food additives.