A tiger is a kind of catamount animal. It looks like a cat, but much bigger than a cat. A tiger is very ferocious and it eats mainly meat. It has yellow and black streaks all over its body and it looks very beautiful. Its tail is long and strong and it can hit its quarry dying.
Tigers live in the thick forests and small animals in the forests are tigers' food.
During the past years, many forests have been cut down and the living conditions of the tigers are becoming worse and worse. There are fewer tigers left in the world now. Tigers are the animals of the world, and they should have their own living spaces. We must do our best to protect the tigers and their living environment.
“叮铃铃”放学的铃声打响了,我迈着轻快地步子沿着自由河河堤走在回家的路上。听着河水拍打河堤的声音,看着老人和小孩在河堤上玩耍嬉戏。不时听见海鸥的.鸣叫,抬头望去几只海鸥在湛蓝的天空上展翅翱翔,把我带入了遐想的世界。突然我的脑袋被一团异物击中把我从遐想中拉了回来。我想什么东西?难道是太空食品。好奇的我用手沾了一点,这团东西热乎乎的,一看这团东西黑中带绿,绿中泛黑。再一闻臭气直钻进我的鼻子。“海鸥屎!”我大叫一声。赶快拿出湿巾擦头,可是臭气并没有离开我身体的意思,我拿起书包捂住头冲进家去,生怕被人看见,我飞快的跑进洗手间连洗了四五次头臭气才彻底的从我头上消散。过了一会儿爸爸回来了,我赶紧隆重的向爸爸介绍这只海鸥以及诉说它的种种罪行可爸爸说:“这并不是坏事。海鸥是特别爱干净的动物,以前这条河是臭水沟根本看不见海鸥的影,现在海鸥来了说明环境变好了。”看在环境变好的份上我大度的原谅了这只海鸥。
如果把环境变好,人和动物拉近关系看作是幸运的话,这真是我的幸运,人类的幸运,更是地球的幸运。
人们往往听到幸运这个词会非常高兴,而我的这次幸运使我哭笑不得。
11.一方面,全世界目前每年向大气中排入50多亿吨二氧化碳;另一方面,森林被大量砍伐,大气中本应为绿色植物吸收的二氧化碳没有被吸收,过多的二氧化碳就像一层厚厚的玻璃遮在地球上空,使得地球变成了一个大暖房。(本小题2分,答出一点给1分,意思对即可给分。)
12.利用生物技术大量培养浮游生物,用细菌和藻等微生物固定二氧化碳;用现代的技术将空气中的二氧化碳分离、回收、液化,把二氧化碳储存起来;将二氧化碳变成一氧化碳。(本小题3分,答出一点给1分,意思对即可给分。)
13.(1这一点是指将二氧化碳变成一氧化碳。(本小题2分)
(2例举法国化学家把二氧化碳变成一氧化碳的例子,是为了说明应用这项技术获得一氧化碳的成本太高,只是在理论上有价值,不能进入实际应用,要想把二氧化碳变成一氧化碳还需努力。(本小题2分,意思对即可给分。)
14.围绕二氧化碳有利这一方面发表自己的看法。(本题3分,言之成理即可给分。)
© 2022 xuexicn.net,All Rights Reserved.