问题
填空题
阅读教材相关内容，了解人工选择的实例和启示：
1．实例：人们饲养的动物和栽培的植物，都是从__________ 经过代代的精心选择和培育形成的。
2．启示：自然界中一定存在着与人工选择相似的过程，即________。
答案
1．野生原种
2．自然选择
搜题请搜索小程序“爱下问搜题”
阅读教材相关内容，了解人工选择的实例和启示：
1．实例：人们饲养的动物和栽培的植物，都是从__________ 经过代代的精心选择和培育形成的。
2．启示：自然界中一定存在着与人工选择相似的过程，即________。
1．野生原种
2．自然选择
| 阅读理解 | ||||||||||
| Nowadays problems with the earth are getting more and more serious. For example, pollution is making the environment not anymore suitable for us to live in. Also, energy is running out. However, there is still something everyone can do in our daily lives to help save our planet. First of all, we should turn off the lights when leaving a room. It's really easy to do. Also, we're supposed to turn off the shower while washing our hair. And are you still using paper napkins? You'd better stop now because paper is made from wood. If everyone uses paper napkins, a lot of trees will have to be cut down every day. Maybe it is hard to stop using paper napkins, but we must try. At the same time, we should think of good ways to recycle paper. Another thing is that we must try to take our own bags when shopping instead of using plastic bags that are provided by the supermarkets. Finally, we must stop driving cars because cars pollute the air. Instead, we'd better ride bicycles. For one thing, it's good for our health. For another, it's much cleaner. I really hope that more and more people will realize the problem and do what they can to help make our world a better place to live in. | ||||||||||
According to Tom's article, fill in the blanks.
|