问题 问答题

温室效应被列为21世纪人类面临的最大威胁之一,二氧化碳是大气中的主要温室气体.为了减缓二氧化碳使全球变暖的趋势,有科学家设想:将排放到空气中的二氧化碳压缩使其液化,然后将其压入到冰冷的深海中.但也有科学家担心海水中富含二氧化碳后酸度会增加,可能会杀死一些海洋生物,甚至会溶解掉部分海床,从而造成灾难性的后果.

(1)为减少二氧化碳这种温室气体的排放,我们可以采取的措施有:______、______.(填两种即可)

(2)二氧化碳气体转变为液体时将会______能量.(填“释放”或“消耗”)

(3)二氧化碳使海水酸度增加的原理用化学方程式表示为:______.

(4)二氧化碳在深海中的溶解度比在通常状况下的水中的溶解度______(填“大”或“小”或“相等”),理由是______.

答案

(1)由于化石燃料中含有大量的碳元素,燃烧后产生大量的二氧化碳,所以减少它的排放可以减少使用化石燃料,开发新能源,不使用化石燃料;

(2)气体液化需要放出热量,所以是释放能量;

(3)反应物为二氧化碳和水生成物为碳酸,再写出方程式就行;

(4)气体的溶解度与温度成反比,与压强成正比,由于深海中的温度低压强大,所以二氧化碳在深海中的溶解度增大.

故答案为:(1)减少使用化石燃料,开发新能源;

(2)释放;

(3)CO2+H2O═H2CO3

(4)大,深海中的温度低压强大.

阅读理解

A woman repeated a bit of gossip(流言) about a neighbor. Within a few days, the whole village knew the story. The person she talked about was deeply hurt and angry.

Later, the woman spreading the rumor(谣言) learned that it was completely untrue. She was very sorry and went to a wise man to find out what she could do to repair the harm.

"Go to the marketplace," he said, "buy a chicken, and have it killed. Then on your way home, pick its feathers and drop them one by one along the road." Although surprised by this advice, the woman did what she was told.

The next day the wise man said, "Now, go and collect all those feathers you dropped yesterday and bring them back to me."

The woman followed the same road, but she was so discouraged when she found the wind had blown the feathers all away. After searching for hours, she returned with only three in her hand.

"You see," said the wise man, "it's easy to drop them, but it is impossible to get them all back. So it is the same with gossip. It doesn't take much to spread a rumor, but once you do, you can never completely undo( 弥补) the wrong."

小题1:Why did the the woman feel sorry ?

A.She didn’t know the story.

B.She hurt her neighbor deeply.

C.She was hurt deeply.

D.She was told an untrue story.小题2:What did the wise man tell the women to do?

A.Kill a chicken.

B.Drop the feathers of a chicken.

C.Collect the feathers of a chicken.

D.All above.小题3:The underlined word “discouraged” might mean       .

A.surprised

B.excited

C.upset

D.pleased小题4:Which of the following statements is true?

A.The gossip didn’t hurt anyone at all.

B.The wise man was not kind enough.

C.All the feathers had been blown away.

D.The woman was given a lesson.小题5:What the wise man said has nearly the same meaning as the Chinese phrase______.

A.覆水难收

B.欲速不达

C.无中生有

D.得道多助

单项选择题