春秋以前，在战场上军功大多录于村社首领名下，普通士兵无论在战争中立下多大功劳都被看作是因村社土地关系而产生的义务，军功不会改变他们的社会地位。其主要原因是（    ）

读“地球上的五带”图，回答：

    Liu Mei has a h____ family. She lives w____ her grandparents and parents in Dantu. Her father is a doctor. He goes to work o____ foot every day. He is not very tall, b____ he is very strong. Her mother is a teacher. She goes to work by car. She often h____ her students at school. Liu Mei's grandparents stay at home. In the morning, they go t____ the park. In the afternoon, they d____ tea with their friends. In the e____, they watch TV .Liu Mei is a student in No.1Middle School. Her school is beautiful. There are many tall b____ there. She wants to s____ everyone around her school. She likes it very much.