一位外国领导人在评价新中国的某项政策时说：“中国经过长时期的流血革命，现在创造出了一条不流血而和平改造资本家的经验，这是有世界意义的。”他高度评价是指我国的哪项政策（    ）

C

    O. Henry was an American writer. He wrote lots of short stories. His real name was William Sydney Porter. He was born in North Carolina in 1862. As a young boy, he lived an exciting life. He did not go to school for a long time, but he learned everything he wanted to know. When he was about 20 years old, O. Henry went to Texas. There he did different jobs. He first worked in a newspaper, and then he has a job in a bank. When some money went missing from the bank, O. Henry was suspected (被怀疑）. Because of that he was sent into prison（监狱）. During the three years in prison, he learned to write short stories. After he got out of prison, he went to New York and continued writing. He wrote mostly about New York and the poor life there. People liked his stories, because although simple(简单), to the reader's surprise, the stories would finish with a sudden change at the end.

生物体在表现为多样性的同时也具有共性：____ 是生物最基本的特征，在此基础上生物才有____ 、____ 和____ 等生命活动。

有许多生物学家呼吁保护生物的多样性，但也有许多实验证明一些野生动物携带有多种致病生物，你觉得应该（　　）