Electricitymakeswonderfulthingspossible．Itkeepsuswarmin...

問題詳情：

Electricity makes wonderful things possible．It keeps us warm in winter，cool in summer， cooks our food，heats our water，cleans our clothes and powers our TVs，radios，video games and computers．

Electricity can travel easily through our bodies．Do you know why？Because electricity moves quickly through water and the human body is 70 percent water!

Electricity can be very dangerous．What will happen if you get shocked？You will find it hard to breathe，your heart will stop beating and you will get burnt and even die! As electricity travels at the speed of light，it’s almost impossible for you to pull away if you really get shocked．And，you should never try to touch anyone who’s been shocked with your hands，because you can become part of the circuit as well!

It sounds terrible，and it is，but if you remember the safety rules，you can always use electricity safely：

1．Never touch an electric appliance if you are standing in water or if your hands are wet．

2．Never touch broken electrical cords．

3．Never put a metal object into an appliance or plug．

4．Keep kites away from power lines．

5．Keep away from downed power lines．

（    ）1．The first paragraph tries to tell_________．

A．how to use electricity

B．electricity can run different appliances

C．electricity is dangerous

D．electricity gives us benefits

（    ）2．Why can electricity travel easily through our bodies？

A．Because we easily get shocked．

B．Because electricity has a treat power．

C．Because our body has much water．D．Because our body has electric charge．

（    ）3．When you get shocked，you will________．

A．find blood flows down            B．find your body is wet

C．always get burnt and even die            D．become part of the circuit

（    ）4．For your safety，you had better never_______．

A．fly kites                        B．touch an electric appliance

C．touch broken electric cords        D．use electric appliance

（    ）5．How much water does the human body have？

A．30 percent             B．50 percent        C．60 percent              D．70 percent

【回答】

1D  2C  3D  4C  5D

知識點：日常生活類

題型：閱讀理解