题干

生物多样性是人类赖以生存和发展的基础。下列关于生物多样性的说法错误的是

A:模拟苍蝇后翅平衡棒的原理,研制出的新型导航仪是利用生物多样性的直接价值

B:建立自然保护区是保护生物多样性最为有效的措施

C:保护生物多样性就是在物种和生态系统二个层次上采取保护战略和保护措施

D:引进物种不慎或对引进物种管理、监测不到位可能破坏生物多样性

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答案(点此获取答案解析)

C

同类题5

阅读下面短文, 从短文后各题所给的四个选项(A、B、C、D)中, 选出可以填入空白处的最佳选项。
     “Paul must have been trying to carry his waste paper to garbage can and dropped a few pieces.” I1picking them up. 2later I found more pieces. No quiet sighing this time. I 3 ,“Who is throwing garbage?” No answer. Instead, I saw more bits of paper silently floating 4 from upstairs. Looking up, I saw my seven-year-old son, Paul.
     “Stop making a mess.” “It's not a mess. They're5.” “Sorry, what did you say?” I hadn't heard him clearly.
    He didn't answer me. Paul has autism (自闭症) and6answers a question, especially when he's7attentively on something else. He ran down the stairs. “Where are my other butterflies?” he asked,8around. Every time Paul 9five or more words together, my heart says a 10of thanks. But lately he seems to 11that the benefits of forming complete sentences when communicating are12of the effort.
    Butterflies. Of course. I rushed to13them from the garbage,14them off and handed them to my young artist. “Want to see them15again?” he asked with a shy smile. “Oh yes! They're beautiful.” I whispered. He ran back upstairs to float his16 down again. They really did look like beautiful butterflies.
    That day Paul 17me to look up at 18instead of down at garbage. How many other masterpieces (杰作) do I miss because I'm too caught up in my 19to take time to appreciate what's right in front of me? Life is not what happens to us. It's 20 we look at it. Now, I look up.