Farley worked for the Canadian government. One day, he was ___   to learn more about wolves. Do wolves kill lots of caribou(北美驯鹿)? Do they kill people?

They gave him lots of food and clothes and guns. Then they put him on a plane and took him to ____  . The plane put him down and went away. There were no houses or people in this place. But there were lots of animals and lots of wolves.

People tell terrible stories about wolves. They say wolves like to kill and eat people. Farley remembered these stories, and he was ____. He had his gun with him___ .

Then one day, he saw a group of wolves. There was a mother wolf with four baby wolves. A father wolf and another young wolf lived with them.

Farley watched these wolves every day. The mother was a very ____ mother. She gave milk to her babies. She gave them lessons about life. They learned how to ____ food. The father wolf got food for the mother. The young wolf ____ the children. They were a nice, happy family—wolf family! Farley did not need his ____ any more. In a short time, he got on well with the family. Farley watched them for five months. He learned that many stories about the wolves were ____. Wolves do not eat people, and they do not eat many large animals. And he also learned bad things about men. It was men who killed many caribou and wolves.

　Later, Farley wrote a book about wolves. He wanted people to ____ them and not to kill them.

有关支气管肺炎与婴幼儿活动性肺结核，下列哪项最有鉴别意义（）

A.发热高低

B.咳嗽程度

C.有无气促

D.肺部固定湿啰音

E.乏力、食欲缺乏