阅读理解。

     It is winter and it is snowing. It usually snows in January here. Betty and James are playing in the

garden. They make a snowman and throw snowballs. They like snow very much!  Their snowman

and throw snowballs. They like snow very much! Their parents don't like it. They always stay in the

house when it is snowing. Mother usually watches TV and father listens to the radio or reads a book.

Now they are sitting in the living room. Mother is writing a letter and father is reading a book.

根据短文内容，回答问题。

1. When does it usually snow?

2. Who likes snow?

3. What does mother usually do when it snows?

4. Where are Mother and Father now?

5. What's Father doing?

企业标准是标准的重要组成部分，以下理解错误的是( )。

A．企业标准以技术标准为主体，还包括管理标准和工作标准
B．企业标准由企业制定，由当地标准化行政主管部门批准发布
C．企业标准发布后，应在当地标准化行政主管部门备案
D．国家鼓励企业制定严于国家标准和行业标准的企业标准