打雷放电时，空气中有极少量氧气会转化成臭氧O₃，下列有关说法中正确的是（    ）

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       大自然，不仅孕育了我们的生命，而且给予我们许多人生的启示。胆怯的企鹅在暴风雨来临前呻吟着，让人厌恶；高傲的海燕热情呼唤暴风雨的到来，令人振奋。力争上游的白杨，象征着北方的抗日军民，受到礼赞；而秀颀高贵的楠木代表顽固倒退的国民党反动派，让人bĭ视。夏天的心脏——石榴，不避（炎阳、艳阳）的直射，保持高尚的民族气节；紫藤罗花的繁盛与líng仃，启迪着生命的哲理—勇敢面对生命中的不幸，拥抱生活，奋发向上。

    Universities are doing everything they can to become a green campus. But there are also items students can do to make your campus more eco-friendly.

1）Recycle everything, especially paper!

    There is a large amount of paper a college student goes through every term.____ We know that these things can't be avoided, but the way you handle the use of all the paper can really help create a better green campus.

2）Buy green.

    ____ Paper, cleaning products and water are products that can be bought as recycled goods. They're slightly more expensive than the normal products, but it's worth it to make a green campus.

3）Walk and bike to school.

    Most campuses, especially those that are trying to become a more eco-friendly campus, have pretty good public transit (公共交通系统).____ Walking or biking will help make your campus a green university.

4） ____

    A water bottle can be refilled at any water fountain and can easily be drunk in class or while riding a bike. This will save the environment by decreasing the amount of plastic waste on your campus.

5）Buy used clothing.

    It is usually thought of as something to do to save money. ____ Recycling clothes minimizes the use of resources to make clothing and puts a dent in the problem of worldwide sweatshops.

A. Carry a water bottle.

B. It is also good for the environment!

C. Buy recycled goods as much as possible.

D. Paper made of this kind of wood is much stronger.

E. On top of that, almost all universities are pedestrian (步行者) friendly.

F. It includes class notes, term papers, student newspapers and so on.

G. Universities call on all the students to learn to recycle all the waste paper.

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—She's is tall with short hair.