随意取m的几个值，分别代入代数式26+2m-{9m-[m-19-（3-6m）]}

阅读理解。

     Most children like watching TV. It's very interesting. By _______ (watch) TV they can see and

learn a lot and know many things about their country and the world. Of course, they can also learn

over the radio. But they can learn better and more easily with TV. Why? Because they can hear and

watch at the same time. But they can' t see anything over the radio. TV helps to open children' s eyes.

TV helps to open their minds, too. They learn newer and better ways of doing things. They may find

the world is now smaller than before. Many children watch TV only on Saturday or Sunday evening.

They are always busy with their lessons. But a few children watch TV every night. They go to bed

very late. They can' t have a good rest. How about you, my young friend?

1. 在横线上填上合适的形式_______

2. Why can children study better and more easily with TV ?

    ________________________________________________________

3. Do all the children watch TV only on Saturday or Sunday evening.

    ________________________________________________________

4. 将划线部分句子翻译成汉语。

    ________________________________________________________

5. TV helps to open children's _______.

A. eyes and minds  

B. minds    

C. eyes or minds  

D. eyes

材料：鲁迅先生就中国的四大发明与应用有一段精辟的论述：“外国用火药制造子弹御敌，中国却用它做爆竹敬神；外国用罗盘针航海，中国却用它看风水；外国用鸦片医病，中国却拿来当饭吃。”（6分）

（1）中国古代的“四大发明”，除了材料中说到的两大发明之外，你知道还有哪两项吗？试着列举出来。哪两个人在你要列举的发明中起到了很大的推动作用？（4分）

发明三：            人物：

发明四：            人物：

（2）鲁迅先生这段话说明了什么问题？（2分）

学前教育目标是促进儿童身体的、情绪的、智能的和社会性的全面发展，这是()

A、工业社会初期

B、工业社会

C、农业社会

D、现代社会

某患者，缺失，左下45间有约1.5mm间隙缺失，基牙条件良好，防止义齿前后翘动最有利的措施是（）

A．扩大基托面积

B．设计舌支托

C．设计间接固位体

D．减少牙尖斜度

E．设计平衡卡环

风险、危机和安全管理的共同特征是不确定性。