首页
登录
职称英语
Acid rain is a very serious air and water pollution problem. Many people fee
Acid rain is a very serious air and water pollution problem. Many people fee
游客
2023-08-31
14
管理
问题
Acid rain is a very serious air and water pollution problem. Many people feel-that it is the most serious pollution problem that we now face. Scientists say that plant and animal life in thousands of lakes in the United States and Canada has already been destroyed by acid rain.
Acid rain forms in the upper atmosphere. There, sulfur dioxide and nitrogen oxides mix with water vapor. They mix with water vapor to form sulfuric acid and nitric acid. When the vapor condenses and rain falls, the acids fall with it. Every time acid rain falls in a lake, the level of acid in the lake rises. Over time, it can rise to the point at which plants and insects cannot survive. Without plants, which supply oxygen, and insects, which supply food, fish die. The lake becomes a dead lake.
The problem of acid rain has greatly increased in the last few years. Most of the blame for acid rain has been placed on industries. However, some people feel that ineffective air pollution laws are also to blame for the acid rain problem.
A few years ago, many cities and states passed local air pollution laws. The laws were written to impr9ve the air quality in the cities and states. However, the laws usually didn’t say anything about the amount of pollution that an industry could pump into the air. Industries found a way to meet the new pollution laws without reducing the amount of pollution they released. They met the new standards by building taller smokestacks.
With the taller smokestacks, air pollutants were released higher up into the atmosphere. The wind carried them far away from the polluting factory. To the people near the factory, the air seemed cleaner. However, the pollution that they once got was now coming down hundreds of miles away in the form of acid rain. [br] Why do lakes in the United States and Canada become dead lakes?
选项
A、Fish in the lakes die because acid rain deprives them of oxygen.
B、Fish in the lakes die from taking in poisonous substances released from the acids.
C、Fish in the lakes die from direct contact with accumulated acid in the water.
D、Air pollutants are dissolved in the water and thus kill the fish.
答案
A
解析
文章第二段说明,因为酸雨破坏了水中的氧气,湖里的鱼无法生存。
转载请注明原文地址:https://www.tihaiku.com/zcyy/2974297.html
相关试题推荐
Mostpeoplewouldbe【C1】______bythehighqualityofmedicine【C2】______to
Mostpeoplewouldbe【C1】______bythehighqualityofmedicine【C2】______to
Mostpeoplewouldbe【C1】______bythehighqualityofmedicine【C2】______to
Mostpeoplewouldbe【C1】______bythehighqualityofmedicine【C2】______to
Mostpeoplewouldbe【C1】______bythehighqualityofmedicine【C2】______to
Mostpeoplewouldbe【C1】______bythehighqualityofmedicine【C2】______to
Mostpeoplewouldbe【C1】______bythehighqualityofmedicine【C2】______to
Mostpeoplewouldbe【C1】______bythehighqualityofmedicine【C2】______to
Mostpeoplewouldbe【C1】______bythehighqualityofmedicine【C2】______to
Smokingisverypopularwithpeople.【C1】______ofthesmokersbelievethats
随机试题
[originaltext]M:Yousaidthatpeopleusethewordiconcarelessly.Doyoucons
【S1】[br]【S4】J此处应填一名词。上句中的knockbackwhattheadultshaddonetothemwhichthe
关于非竞争性拮抗的描述正确的是A.普萘洛尔拮抗肾上腺素的增加心率作用 B.拮抗
“导游对旅游者提出的各种意见与要求,既要积极回应,又要慎重对待。一旦作出了承诺,
阅读下面一首诗,回答问题。(4分) 九日齐山登高 杜牧 江涵秋影雁初飞,与
幼儿初期的孩子,想像不能按一定的目的坚持下去。很容易从一个主题转换到另一个主题。
姜黄的药用部位是A.鳞茎 B.块茎 C.根 D.根茎 E.块根
回收率试验用于验证分析方法的A.精密度 B.准确度 C.线性 D.定量限
A.包粉衣层 B.包隔离层 C.打光 D.包糖衣层 E.有色糖浆片剂包衣
在肌紧张反射中,脊髄前角运动神经元属于A、效应器 B、传入神经元 C、感受器
最新回复
(
0
)