Mike worked for the Canadian government.One day, he was 1 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 2 him to a far-away place.The plane put him down and went away.There were no houses or 3 in this place, but there were lots of animals and lots of wolves.

    There are many 4 stories about wolves.Wolves are said to like to kill and eat people.Mike remembered these stories, and he was afraid.He had his gun 5him all the time.

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

    Mike watched these wolves every day.The mother was a very good mother.She gave milk to her babies.She gave them lessons about life.They learned how to 6 food.The father wolf got food for the mother.The young male wolf 7 the children.They were a nice, happy family—a wolf family! Mike did not need his 8 any more.In a short time, he got on well with the family.Mike 9 them for five months.He learned that many stories about wolves were not true.Wolves do not eat people, and they do not eat many large animals.And he also learned bad things about 10.It was men who killed many caribou and wolves.

    Later, Mike wrote a book about wolves.He wanted people to understand them and stop killing them.

节肢动物的主要特征不包括（　　）

Information Card

2016 年是中国航天创建 60 周年。10 月17 日， 神舟十一号载人的飞船顺利将两名宇航员送入太空；11 月3日，长征五号的首飞成功，标志着我国已经跨入世界大吨位火箭发射行列。“为者常成，行者常至。”中国弹星箭船的每一次升空、每一次飞行，无不是在挑战中实现跨越，在艰辛中铸就辉煌，航天技术的每一次进步都需要中国航天人历经千百次的地面模拟实验，积累丰富的经验，这些经验是中国航天人集体智慧的结晶，从神州一号无人飞行到神舟十一号交会对接，我国一步步坚实地迈向太空。经过几代航天人的建设和发展，我国建成了练完备的航天科技工业体系。探索浩瀚宇宙、发现航天事业、建设航天强国，是中国航天人不懈追求的航天梦。

根据材料，运用“人的认识从何而来”知识，说明中国航天人为什么能“为者常成，行者常至”。