电缆充气段是由哪几部分组成的？

结合实际，说明行为改变的基本方法。

先通读下面的短文，然后根据短文内容和所给首字母，在空格内填入一个适当的单词，使短文意思完整。

How can we students keep ourselves safe? Here are some t  小题1: .

On your way home or to school: W  小题2: for the green traffic light, and look left and right before you cross the road. If you see a car coming, don’t cross until it is really safe. Dress in bright colours, so the drivers can see you c 小题3: .

At school: When students around you begin to push, try to hold onto something, or stay in a safer corner. If you fall down in a crowded（拥挤的）place, cover your head with b 小题4:  hands.

When there’s a fire: Stay c  小题5: and leave quickly. Use a piece of wet cloth to cover your mouth and nose so that you don’t take in s  小题6: . If your clothes catch fire, please drop to the ground and roll from side to side to put out the fire.

For eating: Wash fruit like apples or g  小题7:carefully before you eat them. Check the expiration dates（保质期）and if your food looks or smells t 小题8: , don’t eat it.

For riding on the escalator（自动扶梯）: Hold onto the handrails（扶手）. It is d 小题9:  to run up and down on them. You may fall down because escalator steps（台阶）are not fit for

r  小题10: .

胰液缺乏时，下列哪种物质的消化和吸收不受影响：（）

A．蛋白质

B．脂肪

C．维生素A

D．糖类

下列关于信息和数据的说法中，不正确的是( )。

A．信息是现实世界事物的存在方式或运动状态的反映

B．信息可以感知、存储、加工、传递

C．数据是信息的符号表示

D．信息和数据可以分离，是两个不同的概念

TCP/IP是一组通信协议的代名词，是由一系列协议组成的协议。它本身指两个协议集：TCP为 (4) ，IP为 (5) 。TCP/IP协议时常见的一利，协议，它主要包括以下协议： (6) 、 (7) 、 (8) 。