Why not stay at homethe road is so slipp

阅读下面的短文，选出能回答所提问题或完成句子的最佳答案。

     One day, Bruce played in front of a house. A woman came up and asked Bruce, "Little boy, is your

 mother at home?"

     "Yes, she is, " answered the boy.

     Then the woman went over to ring the bell. The bell rang and rang, but no one came to open the door. 

 The woman got angry and called out to him, "You told me your mother was at home, didn't you?"

     "Yes," the boy answered. "My mother is at home, but this isn't my home."

1. One day, Bruce played _____.

    A. in a park     

    B. in the street    

    C. in front of a house

2. The woman wanted to see _____.

    A. Bruce's mother  

    B. Bruce's father    

    C. Bruce himself      

3. The woman went over to _____ after she talked with Bruce.

    A. knock at the door of the house  

    B. ring the bell of the house

    C. give a call to his mother    

4. The woman got _____ because no. one came to open the door.

    A. pleased  

    B. surprised  

    C. angry  

5. In the story the woman didn't find Bruce's mother because _____.

    A. she went to the wrong house  

    B. she didn't know Bruce's mother

    C. Bruce was not at home                                                                   

在流行性乙型脑炎的叙述中，哪项是错误的

A．可发生化脓性脑膜炎

B．可发生脑软化

C．可见神经细胞变性坏死

D．可见散在及灶性小胶质细胞增生浸润

E．可见小胶质细胞结节形成

课外活动的基本特点是灵活性、自愿性和()。

A．自主性

B．随意性

C．规范性

D．强制性

清洁生产的主要内容是什么？