一群氢原子处于同一较高的激发态，它们向较低激发态或基态跃迁的过程中（   ）

阅读理解

     There are some very good things about open education. This way of teaching allows students to develop their own interests in many subjects. It has open classrooms, open environment, open courses, open attitudes (态度), and open resources(资源).It helps students get a happy school life.

    Open education allows students to be responsible for their own education. Some students do badly in a traditional classroom. The open classroom may allow them to enjoy learning. Some students will be happier in an open education school. They will not worry about grades or rules.

    But many students will not do well in an open classroom. For some students, there are too few rules. These students will do little in school. They will not make good use of open education.

    Because open education is so different from traditional education, these students may have a problem getting used to making so many choices.

    For many students, it is significant to have some rules in the classroom. They worry about the rules even when there are no rules. Even a few rules will help this kind of students. The last point about open education is that some traditional teachers do not like it. Many teachers do not believe in open education. Teachers who want to have an open classroom may have many problems at their schools.

修改病句。

①打乒乓对我十分感兴趣。

②这本故事书的内容和插图都很美丽。

③站在讲台上，我的心热烈地跳动着。

④我怎么也忘不了发生在过去的往事。

⑤我们必须学习那种顽强拼搏。