题目

Mike was starting the fourth grade in the autumn．He felt that he was old enough to ride a bike to school like other kids．But there were two problems! The first was that he didn't know if his parents would let him ride a bike to school．The second and the bigger of the two problems was that he didn’t have a bike，because he and his parents had just moved to the town this summer．     Mike started to get over his problems．First，he asked his parents if they would let him ride a bike to school in the autumn．To his surprise，they said，”Sure，Mike，you are old enough, but yo8．要像保护眼睛一样保护生态环境，像对待生命一样对待生态环境，保护环境，实现可持续发展的重要任务和基本内容是保护生物多样性．保护生物多样性最有效的形式是（　　）A．建立自然保护区B．濒危物种迁出原地保护C．颁布相关法律法规D．建立濒危物种的种质库