“物种一旦灭绝，便不可再生。生物多样性的消失将造成农业、医药卫生保健、工业方面的根本危机，造成生态环境的破坏，威胁人类自身的生存。”保护生物多样性的最根本措施是

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“物种一旦灭绝，便不可再生。生物多样性的消失将造成农业、医药卫生保健、工业方面的根本危机，造成生态环境的破坏，威胁人类自身的生存。”保护生物多样性的最根本措施是（）

A：建立自然保护区

B：保护生物种类的多样性

C：引进更多外来物种

D：保护生态系统的多样性

上一题下一题 0.0难度选择题更新时间:2019-10-16 01:11:10

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D

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My friend Tony is an American1 . He is ten years old. He lives2his family in China now. There are3 people in his family; his mother Mrs. Green, his father Mr. Green and his little sister Amy. He has a white cat.4name is Betty. Look！Amy is playing5 Betty. His father, Mr. Green, is watching TV. His mother is doing housework. What about Tony? He is doing6Chinese homework. He can't 7Chinese well, but he likes Chinese very much. Tony's8works in a TV station. His father works in a school as an9 teacher. Tony and his sister 10 to the same school.

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