保护生物多样性的根本措施是（ ）
A．保护生物种类的多样性
B．保护基因的多样性
C．保护野生动物的多样性
D．保护生物的栖息环境，保护生态系统的多样性
生物的多样性包括生物种类的多样性、基因的多样性、生态系统的多样性．保护生物多样性首先要保护生物的栖息环境、保护生态系统的多样性，生物的栖息环境是生物赖以生存的基础，保护了生物的栖息环境，即保护了环境中的生物，环境与生物是一个统一的整体，二者构成生态系统，因此保护生物的栖息环境，就是保护生态系统的多样性．保护生物的栖息环境、保护生态系统的多样性是保护生物多样性的根本措施．最有效的措施是建立自然保护区．可见D符合题意．
故选：D
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| __1__, I'm Meg. I'm twelve years __2__. I have a brother __3__ a sister. My brother is nine and my sister is __4__ four. I like hamburgers and salad. My brother likes __5__ and my sister likes ice cream. We __6__ a small sports collection. We all like tennis. Today is my __7__ birthday. It's January 21st. There's a big cake __8__ the table. How __9__ is it? Do you know? It's seven __10__. Come to my mother's birthday party and have some cake. | |||
| ( ) 1. A. Hello ( ) 2. A. young ( ) 3. A. but ( ) 4. A. no ( ) 5. A. tomatoes ( ) 6. A. has ( ) 7. A. mother ( ) 8. A. in ( ) 9. A. much ( ) 10. A. fens | B. Sorry B. old B. or B. yes B. tomatos B. sound B. mothers B. on B. many B. jiaos | C. Please C. big C. and C. last C. one tomatoes C. have C. mother' C. at C. some C. dollars | D. Thanks D. small D. with D. only D. some tomato D. play D. mother's D. to D. any D. yuans |
