问题 填空题

人们把生物的种类多样性、______多样性和______多样性统称为生物多样性.保护生物多样性的根本措施是______生态系统的多样性.

答案

生物多样性通常包含三层含义,即生态系统的多样性、物种的多样性和基因的多样性.生物必须适应环境才能生存,每种生物都生活在一定的生态系统中,当植物十分丰富的森林生态系统变成单一的农田后,生物种类会迅速减少,破坏了食物链,影响了生态系统的稳定性;当生态系统发生剧烈变化时,一些生物不在适应环境,迁走或死亡,如鸟类和哺乳类大量减少.鸟类减少,各种农林害虫失去天敌的控制,就大量繁殖起来,给农作物和树木造成了严重的危害.因此也会加速种类多样性和基因多样性的丧失,因此,保护生物多样性的根本措施是保护生物的栖息地,保护生态系统的多样性.

故答案为:基因;生态系统;保护.

阅读理解

根据描述为下列人物选择应该借鉴文章中的哪条建议(将相应数字序号填在横线上)

How to Make Friends

1. It’s hard to make friends if you stay home alone all the time. Get out of the house and do things that will put you in touch with other people. Join a club or play a sport. Attend meetings or other groups. It’s easier to make friends when you have similar interests.

2. Learn from people who seem to have lots of friends. Watch carefully how they make and keep friends. Don’t copy all of the things they do, but try to notice what they do. Then try some of those things yourself.

3. Don’t be afraid to show people what you’re really good at. Talk about the things you like and do best. Don’t hide your strong points. People will be interested in you if there is something interesting about you.

4. Plan things to talk about with people. Find out what’s in the newspaper headlines, listen to CDs, learn about what’s new with your favorite TV or movie star. The more you have to say, the more people will be interested in having a conversation with you

5. Look people in the eye when you talk to them. That way, they’ll find it easier to talk to you. It’s very difficult to have a conversation with people whose eyes are looking to the left, to the right, or at the floor. People may think you’re not interested in them and may stop being interested in you.

6. Be a good listener. Let people talk about themselves before talking about “me, me, me.” Ask lots of questions and show an interest in their answers.

____4_______a. Tony is never sure what to talk about when he meets people.

____________b. Rose wants to know why her classmate, Cindy, is so good at making friends.

____________c. Adam stays home every weekend and watches videos.

____________d. Benson is a very good dancer, but he never tells anyone about it.

____________e. Martha doesn’t care for others. She always talks about herself.

____________f. When Pedro feels uncomfortable talking to someone, he starts to look away.

a____4__;   b.________;    c._______;   d.______;   e.______;   f._______

单项选择题 A型题