Nowadays with the development of the economy, our life is becoming easier and easier in many ways. We can drive a car to travel to and from work. We can save a lot of time, shopping online instead of going to stores. Besides, the elevator is widely used in our daily life. 【小题1】 The elevator safety troubles us from time to time. Here are several ways for you to help you use the elevator safely.

【小题2】

Before stepping on the elevator, you should check your and your children's clothing for the loose parts, such as shoelaces（鞋带）and gloves, which can be trapped in the moving parts.

Mind your position.

【小题3】 Tell your children not to lean on the handrail（扶手）, which can slow down the elevator and may make other people lose their balance. You should stand on the right instead of on the left, which is convenient for some people who are anxious to go downwards or upwards.

Locate the emergency stop button.

【小题4】 The button may be near the bottom, but sometimes alongside the stairs. If the elevator breaks down, it is helpful for you to stop the elevator.【小题5】

   Fights at school have become an increasingly familiar sight for children. You should know what to do if you are in a fight, or see a fight at school. 【小题1】

You should try to get away if you can. If you know someone is coming up behind you to attack, turn toward the person with your hands up in front of your body and loudly say “stop” before walking away. 【小题2】 If the person doesn’t stop, cry for help by calling out the name of a teacher whose office is nearby.

【小题3】 In some school areas, everyone involved in a fight can be punished, no matter who started it.

What should you do if you see a fight? You mustn’t jump in to break up a fight or help a friend. If you get involved in a fight，you may suffer injuries and punishment. 【小题4】 It’s a good choice to find an adult or call the police. Shout loudly to break up the fight or warn that an adult is coming.

【小题5】 It only provides temporary（临时的）relief for the attacker and causes more trouble. If you are concerned about fights at school, the best thing you can do is talk to an adult who will listen and take action.

   In the United States alone,over 100 million cell-phones are thrown away each year.Cell-phones are part of a growing mountain of electronic waste like computers and personal digital assistants.The electronic waste stream is increasing three times taster than traditional garbage as a whole.

Electronic devices contain valuable metals such as gold and silver.A Swiss study reported that while the weight of electronic goods represented by precious metals was relatively small in comparison to total waste,the concentration（含量）of gold and other precious metals was higher in So-called e-waste than in naturally occurring minerals.

Electronic wastes also contain many poisonous metals.Even when the machines are recycled and the harmful metals removed,the recycling process often is carried out in poor countries,in practically uncontrolled ways which allow many poisonous substances to escape into the environment.

Creating products out of raw materials creates much more waste material,up to 100 times more,than the material contained in the finished products.Consider again the cell-phone,and imagine the mines that produced those metals,the factories needed to make the box and packaging（包装）it came in.Many wastes produced in the producing process are harmful as well.

The U.S Environmental Protection Agency notes that most waste is dangerous in that"the production, distribution,and use of products-as well as management of the resulting waste-all result in greenhouse gas release." Individuals can reduce their contribution by creating less waste at the start-for instance,buying reusable products and recycling.

In many countries the concept of extended producer responsibility is being considered or has been put in place as an incentive（动机）for reducing waste.If producers are required to take back packaging they use to sell their products,would they reduce the packaging in the first place?

Governments' incentive to require producers to take responsibility for the packaging they produce is usually based on money.Why,they ask,should cities or towns be responsible for paying to deal with the bubble wrap（气泡垫）that encased your television?

From the governments' point of view,a primary goal of laws requiring extended producer responsibility is to transfer both the costs and the physical responsibility of waste management from the government and tax-payers back to the producers.

How to clean your dirty laptop

You know your laptop is dirty, But when's the last time you cleaned it? 【小题1】. The keys are clean, the screen is free of smudges(污迹) and you fall in love with that three-year-old laptop all over again.

Gather your supplies

“You don't need much to clean a computer,” said Jolie Kerr, a cleaning expert. “I use exactly found things to keep my laptop clean: Rubbing alcohol, microfiber cloths, cotton swabs(棉签) and canned air.” 【小题2】. They'll work fine, but they’re probably overpriced compared with what you have at home.

Start with the inside

【小题3】. If there are visible dust bunnies in the vents, you' re let it go far too long without a cleaning In that case, you may want to open it up or take it to a repair shop for an in-depth cleaning.

Wipe down the outside

【小题4】. “The most critical thing when cleaning a laptop or desktop computer is to app the cleaning product to the tool you're using to clean, never ever directly onto the computer” Ms. Kerr said.

 Get rid of bad smell

Let's say you have a particularly terrible case of dirty laptop, and even after the above steps, your laptop still carries the bad smells. Getting rid of those is a challenge. 【小题5】For that you can turn to the world's best natural deodorize(除臭剂): Charcoal.