We should _____ the power when our TV or computer is not used.
A. turn on B. turn off
C. turn up D. turn down
八年级英语单项填空简单题
We should _____ the power when our TV or computer is not used.
A. turn on B. turn off
C. turn up D. turn down
八年级英语单项填空中等难度题查看答案及解析
We should _____ the power when our TV or computer is not used.
A. turn on B. turn off
C. turn up D. turn down
八年级英语单项填空简单题查看答案及解析
—We can save power by using air-conditioners less.
— , turning off the computers when we do not use them is also a good way.
A. Moreover B. However C. Otherwise D. Anyway
八年级英语单选题困难题查看答案及解析
People always argue whether a human is a _______ calculator than a computer or not.
A.powerful B.more powerful
C.most powerful D.the most powerful
八年级英语单选题简单题查看答案及解析
When the traffic lights turn red, we will stop driving a car or crossing a street. Why is red used for traffic lights instead of other colors?
As we know, scattering (散射) happens when light goes through the air. For the same media (媒质), if the wavelength is long, the sscattering will be short. If the wavelength is short, then the scattering will be long.
Of all lights we can see, red has the longest wavelength. So the scattering is the weakest. That means the red light travels far. In fact, it travels farther on rainy days.
Using the red light can help drivers in farther places see the lights. It helps drivers slow down or stop in time. So there will be fewer accidents. Moreover, red can also excite people. We can act more quickly when we see the color red. In a word, red lights help drivers stop in time and help prevent accidents.
1.According to the passage, the scattering of the red light is the _______.
A. longest B. weakest C. farthest D. brightest
2.The underlined word “wavelength” means________ in Chinese.
A. 光波 B. 波浪 C. 波长 D.光波
3.What can the red light help drivers do?
A. It can make drivers stop in time.
B. It can help drivers act more slowly.
C. It can help drivers see the lights in farther areas .
D. A and C
4.Which of the following is the best title?
A. Why do accidents happen
B. How does the red light travel
C. Why do we use red traffic lights
D. The colors of the traffic lights
八年级英语阅读理解中等难度题查看答案及解析
阅读理解。
Someday in the future we may not need to have money in our pockets. Is life easier when people don’t need to carry any money at all? Is money heavy to carry? Is it safe to carry money? Maybe in the future each of us will have only one small credit card(信用卡). We will use it instead of money to buy all the things.
Of course we may still have some of the same problems with cards we now have with money. For example, we lose money from time to time. Maybe we will lose the cards. Maybe someone will take the cards. Someone may even make a card that looks like our cards. Since we can’t buy anything without our cards, the credit cards may be no better than money.
Is there something easier to use than credit cards? Each of us has a thumbprint(拇指指纹). No two thumbprints are the same. Maybe someday the government will keep people’s thumbprints with a number. When you want to buy something, you will put your thumb on a machine or a computer. Each store or business willpossesone. Everyone’s thumbprints will be in the computer. It will be difficult to lose our thumbprints! It will be difficult for someone to steal it or to make one like it.
1.The writer probably agrees that credit cards are ________ to carry than money.
A. heavier B. easier C. more difficult
2.What may be a problem with credit cards in the future?
A. We may lose the cards from time to time.
B. We won’t be able to make enough cards.
C. We may not know how to use the cards.
3.Someday the government may keep people’s thumbprints with a ________.
A. sign B. note C. number
4.The underlined word “posses” probably means “________” in English.
A. lend B. have C. sell
5.In the writer’s opinion, it’ll be the best way to buy things with ________ in the future.
A. money B. credit cards C. thumbprints
八年级英语阅读单选中等难度题查看答案及解析
Someday in the future we may not need to have money in our pockets. Is life easier when people don’t need to carry any money at all? Is money heavy to carry? Is it safe to carry money? Maybe in the future each of us will have only one small credit card(信用卡). We will use it instead of money to buy all the things.
Of course we may still have some of the same problems with cards we now have with money. For example, we lose money from time to time. Maybe we will lose the cards. Maybe someone will take the cards. Someone may even make a card that looks like our cards. Since we can’t buy anything without our cards, the credit cards may be no better than money.
Is there something easier to use than credit cards? Each of us has a thumbprint(拇指指纹). No two thumbprints are the same. Maybe someday the government will keep people’s thumbprints with a number. When you want to buy something, you will put your thumb on a machine or a computer. Each store or business will posses one. Everyone’s thumbprints will be in the computer. It will be difficult to lose our thumbprints! It will be difficult for someone to steal it or to make one like it.
1.The writer probably agrees that credit cards are ________ to carry than money.
A. heavier B. easier C. more difficult D. more expensive
2.What may be a problem with credit cards in the future?
A. We may lose the cards from time to time.
B. We won’t be able to make enough cards.
C. We may not know how to use the cards.
D. We may make cards like others.
3.Someday the government may keep people’s thumbprints with a ________.
A. sign B. note C. number D. symbol
4.The underlined word “posses” probably means “________” in English.
A. lend B. have C. sell D. make
八年级英语阅读单选中等难度题查看答案及解析
Our teachers always tell us fast when we go to or from school.
A. not ride B. don’t ride C. to not ride D. not to ride
八年级英语单项填空简单题查看答案及解析
Don’t worry. Our teacher will come to show us the computer.
A. how can we use B. what to use C. how to use D. how to use it
八年级英语单选题困难题查看答案及解析
短文填空
What will our life be like in the future？We won't use paper to1.on.We can study on computers.And there will2.fewer cars and less pollution.Everyone will play a3.in saving the earth.The sea will be cleaner and the sky will be 4..So the environment will be better and better.
I believe people will even have robots in their homes.They can help5.the housework.Of course,there are already robots6.in factories now.They do simple jobs over and over 7..And they will never get tired.
People will be8.to fly to the moon for holidays.Perhaps people will live on a9.station one day.However,some people disagree.They think it is10.for humans to live on the moon.
八年级英语单词填空中等难度题查看答案及解析