20millionpeoplealloverAmericacelebratedthefirstEarthDay(地球节)onApril22,1970.Nowpeopleacrosstheworldcelebrateit.EverydaywecanhearworsenewsaboutourEarth.Reportstellusthatwildlifeandforestsa
20 million people all over America celebrated the first Earth Day(地球节)on April 22,1970.Now people across the world celebrate it.
Every day we can hear worse news about our Earth.Reports tell us that wildlife and forests are disappearing at a fast speed(速度) and the pollution is more and more serious.There are many kinds of pollution,such as air pollution(污染),water pollution,noise pollution and soil (土壤)pollution.They are all bad for our health.What can we do to protect our mother Earth?
In fact,we do not have to feel helpless.We can learn practical(实用的)ways to make our environment(环境)better.For example,saving and recycling newspapers.And still many other small things can help protect the environment.
1.Which country celebrated the first Earth Day?
A.All countries together B.China. C.Japan. D.America.
2.How many kinds of pollution does the passage mention(提及)?
A.1 B.2 C.3 D.4
3.What are disappearing fast on Earth?
A.Animals and forests B.Wildlife and forests
C.Soil and wild life. D.Population and forests
4.What does the writer try to do?
A.To tell people that our Earth is dying.
B.To tell people that we are helpless to save our Earth
C.To ask people to find out more ways to save our Earth.
D.To ask people to celebrate Earth Day every year.
5.Which one is in the right order for the following festivals?
1.Children’s Day 2.Earth Day 3.Christmas Day 4.Labor Day
A.2-4-1-3 B.1-2-3-4 C.4-2-3-1 D.4-3-2-1
线性代数证明,设A是n阶方阵,且A的平方等于En,证明R(A+E)+R(A-E)设A是n阶方阵,且 2020-04-05 …
连字成词(英语)l u o e b s r u s r e t o s w a e s r t e 2020-05-14 …
可以参考的公式是:s[1]=a[1];s[n]=s[n-1]>=0?s[n-1]+a[n]:a[n 2020-05-14 …
设n阶矩阵A满足A*A=A,E为n阶单位阵,证明:R(A)+R(A-E)=n 2020-05-15 …
设A为n阶方阵,E为n阶单位矩阵,证明R(A+E)+R(A-E)》n, 2020-05-15 …
用这些英文字母拼词这些英文字母打乱了顺序.一个题目一个词.第一题:r,c,t,a,e,s,r第二题 2020-05-16 …
英语、成语问题身()志()o,o,b,b,a,m单词:中文:()e,a,l,f单词:中文:()t, 2020-07-24 …
高中数学——数列已知有穷数列{a(n)},a(1)=2,前n项和为S(n),且a(n+1)=(a- 2020-08-02 …
排列成正确的句子:me,I,go,excuse,haveto.排列成正确的单词:1.c,d,e,s, 2020-11-01 …
数据结构将下列各算术运算式表示成波兰式和逆波兰式:(A*(B+C)+D)*E-F*GA*(B-D)+ 2020-12-15 …