What can drones do? Their many uses include taking pictures from the sky, observing(观察)wild animals and delivering packages. Now these small flying robots are leading a new farming revolution(革命), according to the Food and Agriculture Organization of the United Nations.
When equipped(装备)with cameras and other data-gathering devices, drones provide us with an eye in the sky. Here are a few of the farming-related jobs drones can do.
Looking for sick crops
Drones can scan(扫描)crops using different kinds of light. Then, they produce multispectral images(多谱图像)that can help us find sickly yellow plants within fields of green. Drones can also detect bacteria(检测细菌)that are harmful to crops in the air from a few kilometers away. Farmers can check the drones’ air samples(样本)and try to find ways to protect their crops before the bacteria get to them.
Counting cattle
When flying over cattle, drones can track the livestock and find out where fences need fixing. People can also equip drones with thermal imagers(热像仪)and night-vision cameras. This can help farmers look for animals that could harm their cattle.
Water watch
Most fields aren’t perfectly flat(平坦的). After watering, some places may dry out faster than others. Other spots might not get water at all. Drones can scan the field and make a 3-D map. Using the map, farmers can figure out which parts of a field are dry or need improvement.
Spraying pesticide(喷洒农药)
Different parts of a field might be uneven or have different altitudes(高度). Drones can check for this when flying above the land. Then, they change their height and therefore spray the correct amount of pesticide over each part of the field. This is more efficient than traditional pesticide spraying. Drones can finish spraying a field up to five times faster than with traditional machinery, according to a study from MIT.
1.What can drones do to help farmers with their farming?
A.Take pictures. B.Look at wild animals. C.Deliver packages. D.Look for sick crops.
2.What do drones need to help guard cattle at night?
A.Wooden fences. B.Air samples. C.Night-vision cameras. D.3-D printers.
3.What does the underlined word “uneven” probably mean?
A.不肥沃的 B.不相连的 C.不平衡的 D.不平坦的
4.What do we know from the story?
A.Drones can’t detect bacteria unless crops are sick.
B.Drones can fight dangerous animals.
C.Drones can help farmers make sure fields are properly watered.
D.Drones are better at spraying pesticide over flat land.
九年级英语阅读单选困难题
When you speak to foreigners, what will you do if you can’t understand their languages? Will you use your body language to help you, or just say sorry to them and then go away? Learning spoken language is very important, but learning local gestures (手势) is also very necessary.
I often use gestures to communicate with someone whose language I don’t know. We use our hands to talk with each other. Although we don’t understand the other’s words, our hand movements make our conversation more necessary.
However, gestures aren’t always clear. Different gestures may have different meanings in different countries and cultures.
In many countries, people move their hands at someone to call him to come near. In the United States, people usually move hands at someone with their palms (手掌) up and sometimes move just one finger. But in many countries in Asia, hand movements like that would be impolite. In Asia, many people move hands at someone with their palms down using all fingers.
Do you use your thumb, your thick short finger to make gestures? In western countries, “thumbs-up” means agreement. But it is very rude in parts of Africa.
If you want to say “OK” in America, you can make a circle (圆) with the thumb and the second finger. But in France, it means “zero”, and it is very rude in many other countries.
You can use your second finger to point at something but not at somebody in the United States. However, in some parts of Europe, Asia and Africa, pointing at something with one’s second finger is not polite.
“V” form is often used when people take photos. But using two fingers to make up the “V” shape means “peace” in the West.
The last example is that people in parts of Asia point to their noses to mean themselves, but people in western countries usually point to their chests.
Gestures are important, but also have different meanings.
1.The writer begins with the questions in order to________.
A.tell a story B.solve some problems
C.catch readers’ attention D.introduce some gestures
2.It’s OK to________ to call someone to come near by moving just one finger.
A.America B.Asia C.Africa D.Europe
3.According to the passage, we can learn that________.
A.pointing one finger at someone in the United States is sometimes allowed B.using “thumbs-up” as your body language is very rude in parts of Africa
C.making a circle with the thumb and the next finger means “0” in America D.using two fingers to make up the “V” shape means “success” in the West.
4.The best title of this passage can be “_______”.
A.Work hard to Learn Different Cultures around the World B.Talk to Other People with Spoken Language Successfully C.Different Gestures Are Difficult to Understand and Learn
D.Making Sure Your Gestures Are Saying What You Want to Say
九年级英语阅读单选中等难度题查看答案及解析
How many plastic bags do you use every day? 46there any chance for us to live without them? What can we do to have 47plastic pollution? A performance in Hangzhou makes people 48more about the overuse of plastic bags in our lives.
In front of a supermarket in Hangzhou , five volunteers 49white plastic bags and walked around and through the crowd. The performance 50people to use more cloth bags51 plastic ones.
Some of the plastic bags worn by the performers were collected from customers in two food markets and 52were collected by 700 students from a middle school.
On that day, when leaving the food markets, customers were told to hand over 53plastic shopping bags. 54plastic bags were collected in two hours.
“ If we do 55about it, the earth will be eaten up by white pollution. And 56will become ‘plastic men’,”said one of the performers.
“How can you breathe in 57plastic bags?” A 58woman asked one performer.“How can the earth breathe 59there are too many plastic bags?”the performer answered.
Starting in June 2008,plastic bags were 60given for free in supermarkets,shopping malls or food markets all over the country.
People are called on﹙号召﹚to use cloth bags when they go shopping.
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九年级英语完型填空中等难度题查看答案及解析
— We can use this special pen to record or take pictures?
— Really? Will you please show me it?
A.how to use B. what to use
C. why to use D. where to use
九年级英语单项填空中等难度题查看答案及解析
What can be used to put out the fire in the following pictures?
九年级英语单项填空中等难度题查看答案及解析
Next time you' re in a public place, take a look around you, and see how many people are using their phones. 1.
In fact, I' m an example of this, but it always amazes me how people can spend so much time on their phones.
For example, I recently visited London and traveled on the subway while I was there. 2. Being underground it is difficult to get any signal (信号) and people couldn't use the Internet. They were playing games, reading articles or listening to music on their phones. 3.
Recently, my smart phone broke and I had it repaired. So I had to use a really old phone. 4. And I loved it. I loved being free from the Internet, and I really didn' t mind not getting updates (更新) on what my friends were doing. It allowed me to enjoy my time in London more and I could watch the people around me and really see what was going on.
5. Perhaps I should just continue to use the old phone and forget I ever got my smart phone back...
根据材料,将A—E五个句子还原到文中空白处,使短文完整、通顺,并将其标号填写在下面题号后的横线上。
A. All I could do on this phone was to send text messages, make calls and play one game.
B. But I am sure that as soon as they came out from the subway station they would start calling or checking their e-mails.
C. I can tell you now that it is probably more than half.
D. Usually some people were asleep, and nearly everybody else was using their phones.
E. However, I knew that as soon as I got my smart phone back I would be one of those people once again.
九年级英语补全对话中等难度题查看答案及解析
What do you think of the picture? The picture tells us whatc1.PM2.5. From the picture, we can see that much traffic is the mostl2.reason. Many cities in China suffered from p3.air in 2015. People have to wear masks when going outside. China is trying to d4.with these problems. As students, we can have a greener lifestyle, such as takingp5.transportation, using cleaner energy, etc. I am sure we’ll have a bluer sky sooner.
九年级英语短文填空困难题查看答案及解析
请仔细观察下面的图片,并根据所给提示和要求写一篇短文。
提示:(1) What can you see in the picture?
(2) What should you do if you want to keep a healthy body?
要求:(1)短文须包括所有提示内容,可适当发挥。
(2)短文中不要出现真实的地名、校名和人名。
(3)词数80个左右(开头已给出,不计人总词数)。
参考词汇:overweight(超重的),eating habits, sports
In the picture, I can see_________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
九年级英语材料作文中等难度题查看答案及解析
We live on the earth. We use the sea around us. What do we take from the ocean? And what do we give to it?
We take fishes from the ocean—millions of kilograms of fish, every year, to feed millions of people.________1.________ We take minerals(矿物) from the ocean. We can get salt by evaporating(蒸发) seawater.________2.________ Many other minerals, such as gold, can be also got from the sea, but not by simple evaporation. 3.________ Seaweed(海草) becomes food of many kinds— even candy, and ice cream—as well as medicine. Believe it or not, fresh water is another gift from the sea. We can’t drink ocean water. ________4.________ But ocean water becomes fresh water when the salts are removed. In the future, we will find ourselves depending more and more on fresh water from the sea.
The sea gives us food, fertilizer, minerals, water and other gifts. What do we give the sea? We pollute the ocean all the time. 5. Throwing waste into the ocean is killing off sea life. Yet as the world population grows, we may need the sea and its gifts more than ever.
We are finally learning that if we destroy our sea, we might also destroy ourselves. Hopefully, it is not too late.
根据以上内容,从下列五个选项中选择适当的句子还原到短文中,使短文完整与正确。将其标号在答题卡上涂黑。(每小题2分,共10分)
A. Other gifts from the sea , such as seaweed, can be also got from the sea. B. Huge as it is, the ocean can’t hold all that we pour into it. C. Along with salt, other minerals are left after evaporation. D. We even use their bones(骨头) for fertilizer(化肥). E. Some of its contents(所含物) may cause illness. |
九年级英语阅读理解困难题查看答案及解析
What do people do with their old, out of date but still useful computers? Most people don’t know how to deal with them. Many old computers are put away. Many more are simply thrown away as rubbish.
Finally, some companies are thinking of ways to bring down the number of old computers. Sony has agreed to help recycle old Sony products(产品). Dell, Hewlett Packard and other companies now also take back some old computers of their own brands.
In some countries, laws have been passed, too. Computer companies have to pay for collecting and recycling their used products. And 70% of computer waste must be recycled. The idea behind the laws is that computer companies themselves should pay for the cost. That will encourage them to make computers which are easier and cheaper to repair and upgrade(升级).
Yet many people are throwing away good computers, while others cannot afford them at all. Hundreds of organizations are working on this problem. They collect and repair old computers. Some also teach others how to repair computers. These repaired computers then go to schools, charities(慈善团体) or people who need them. Giving a used computer to one of these organizations can turn one person’s rubbish into someone else’s useful things and cut down waste, too.
根据短文内容,选择正确答案。(10分)
1.What do many people do with old computers?
A.They sell them. B.They send them to others. C.They stop using them.
2.How many computer companies are mentioned in the second paragraph?
A.One. B.Two. C.Three.
3.According to the laws in some countries, computer companies must .
A.recycle most of their products
B.collect all their used products
C.make more cheaper computers
4.What do the organizations do to solve the problem of old computers?
A.Help the computer companies to collect them.
B.Repair and send them to those who need them.
C.Help people to learn to use them.
5.What is the main idea of this passage?
A.Repairing old computers.
B.Encouraging to make cheap computers.
C.Recycling old computers.
九年级英语阅读理解中等难度题查看答案及解析
What do people do with their old, out of date but still useful computers? Most people don’t know what to do with them. Many old computers are put away in homes. Many more are simply thrown away as the rubbish.
Finally, some companies are thinking of ways to bring down the number of old computers. Sony has agreed to help recycle old Sony products(产品). Dell, Hewlett Packard and other companies now also take back some old computers.
In some countries, laws have been passed, too. Computer companies have to pay for collecting and recycling their used products. And 70% of computer waste must be recycled. The idea behind the laws is that computer companies themselves should pay for the cost. That will encourage them to make computers that are easier and cheaper to repair and upgrade(升级).
Yet while many people are throwing away good computers, others cannot afford them at all. Hundreds of organizations are working to solve this problem. They collect and repair old computers. Some also teach others how to repair computers. The computers then go to schools, charities(慈善团体) and people who need them. Giving a used computer to one of these organizations can turn one person’s rubbish into someone else’s useful things and cut down waste, too.
1.What do many people do with old computers?
A.They repair them. B.They sell them.
C.They send them to others. D.They stop using them.
2.How many computer companies are mentioned in the second paragraph?
A.One. B.Two. C.Three. D.Four.
3.According to the laws in some countries, computer companies must .
A.recycle most of their products
B.collect all their used products
C.repair and upgrade old computers
D.make more cheaper computers
4.What do the organizations do to solve the problem of old computers?
A.Help the computer companies to collect them.
B.Repair and send them to those who need them.
C.Help people to learn to use them.
D.Turn rubbish into useful things.
5.What is the main idea of this passage?
A.Repairing old computers.
B.Encouraging to make cheap computers.
C.Recycling old computers.
D.Helping those who need computers.
九年级英语阅读单选中等难度题查看答案及解析