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A little battery puts out a little bit of electricity, so you can use it safely for your

英语试题 07-02
阅读下面短文,从短文后的选项中选出可以填入空白处的最佳选项。选项中有两项为多余选 项。
A little battery puts out a little bit of electricity, so you can use it safely for your experiments. But the electricity that comes through the wires in your house or school is much more powerful 16   .
Inside the walls where you live or study, there are big wires that carry electricity. When you plug in a light or radio or other electrical appliance, you are putting the light or radio in the path way of the electricity. You have heard adults warn, “ 17   ,‘ Now do you know why? If you did, you would become part of the electrical path way.
18 The electrical current coming through the wires to the wall plug is so strong that it would hurt a lot if you stuck your finger in the plug. Put your finger in there and it could be you, rather than the light bulb, that becomes part of the electrical path way. And that would hurt!
What if you held a piece of metal, like a fork or knife, and stuck it into the wall plug? Don't do it. Why? It's because metals also conduct electricity. 19
Don't touch any electrical appliance when you are wet. Can you think why? It's because water is a good conductor of electricity. When your hands are wet or when your body is in a bathtub full of water, the electricity could flow right through you and give you an awful shock, or even kill you.
Electricity is very useful, but it can be dangerous. 20   If so, electricity can better serve you, instead of hurting you.
A. Life is precious!
B. So stay away from wires.
C. Be careful, be safe and be smart.
D. And you would get a terrible shock!
E. Don't stick your finger into the wall plug.
F. Therefore, keep in mind some safety rules.
G. Your body is a pretty good conductor of electricity.

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