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题型:阅读理解-单选 难度:0.4 引用次数:33 题号:16096844

Look around you. What do you see? Lots and lots of stuff (东西) . And it’s likely that almost all of the stuff is man-made, whether it’s a tiny pen or a huge building.

Scientists at Israel’s Weizmann Institute of Science recently made a shocking discovery about our stuff. They found that the mass of all man-made materials is now greater than the mass of all living things on Earth. That is to say, all of our stuff weighs more than the combined weight of every person, plant, and animal on the planet.

“If you didn’t believe before that humans are dominating the planet, then you should believe it now,” said scientist Timon McPhearson.

So why does this matter? For one thing, it shows how much damage we’ re doing to the planet. The more stuff we make, the more natural resources we use. Taking and using these resources damages Earth in many ways. For example, burning coal pollutes the sky and makes global warming worse. Mining for gold and other metals can pollute groundwater.

In fact, this research “shows us our impact on the planet,” according to US scientist Josh Tewskbury. Unfortunately, it doesn’t give us any specific advice on what to do other than to be careful about how we use our natural resources.

1. Scientists recently found that ________.
A.Earth is facing serious pollution
B.humans can’t live without man-made materials
C.man-made materials will take control of Earth one day
D.man-made materials are heavier than all living things on Earth
2. The underlined word “dominating” in Paragraph 3 probably means ________ .
A.controllingB.creatingC.breakingD.polluting
3. Paragraph 4 mainly explains ________.
A.how people use natural resourcesB.what problems Earth is facing
C.how making things damages the planetD.why people create so much stuff
4. What advice should we follow according to the research?
A.We must use our resources carefully.B.We don’t need to worry about pollution.
C.We should recycle when we can.D.We shouldn’t use any man made materials.
5. In which section can we see this passage?
A.Entertainment.B.Fairy tales.C.Science.D.Advertisement.
【知识点】 科普知识 说明文

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【推荐1】Writing is a much newer invention than talking. Nobody knows when people first began to talk, but so far as we know, they did not begin to write until seven or eight thousand years ago.


In Egypt, Mesopotamia, and China, and later in Palestine and Greece, people began to make marks and pictures with sticks and sharp stones from which others, or they themselves later could see what they had thought.

These early records were the beginning of writing. The first writing was picture writing. Here are some early Chinese picture words. Can you see what they represent (代表)?


Later Chinese writing is less like pictures than the earlier writing was, but we can see the pictures in some of its words. For example:


In picture writing, each picture represents a word; you need a different picture or mark for each word. In present﹣day Chinese writing most of the marks are not pictures of anything,   and a reader has to learn how the Chinese write about two thousand of these words before being able to read a newspaper.

With some of these marks you may be able to see what the idea is. For example:

The sun and the moonIts meanings are:"bright" and "open".

A man and two marksOne of the meanings is "humanity".

1. When did people begin to write?   
A.Seven or eight hundred years ago.
B.Before people first began to talk.
C.Seven or eight thousand years ago.
2. Which of the following is the earliest Chinese picture word?   
A.B.C.雨
3. What does the明in the passage mean?   
A.Day and night.
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C.Humanity.
4. What's the passage mainly about?   
A.The history of Chinese writing.
B.When Chinese people began to write.
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While the banana is a common fruit we enjoy in our daily lives, have you heard of its relative, the enset banana?

①________ This plant is a main food for more than 20 million people in Ethiopia. However, don’t be fooled by the inedible (不可食用的) nature of its orange fruits! Scientists believe that the enset may provide food for over 100 million people in Africa. This could be a game-changer for solving the famine ( 饥荒) that becomes worse because of the climate change.

②________ The enset is a plant that belongs to Musaceae (芭蕉科), the same family of flower plants as the banana. The tree can grow up to 10 meters tall. Unlike the banana, the fruits of the enset plant are inedible. This has earned it the nickname of “false banana”, as the plant is used more for its carbohydrate-rich stems(茎) and roots.

③________ However, the planting of the enset is just in Ethiopia, where the plant is fermented (发酵) to make dishes like porridge and bread. Food made from the enset is especially good for the body with high calcium, potassium, and zinc, as well as amino acids. When Ethiopia experienced its most serious famine in a century during the 1980s, the enset played a major role in helping communities recover from the crisis. Besides being an important part of the Ethiopian diet, the enset is also used in traditional medicine, animal feed, and construction materials in the country.

④________ Because of climate change, changeable temperatures and extreme weather events are bringing risks to crop harvests. There isn’t enough food in many regions of Africa. Scientists believe that the enset can help solve this problem. The enset is a very hardy plant, able to survive at different temperatures and regions. The enset can be harvested at any stage of its growth throughout the year and can be stored for long periods of time. All of these characteristics make it a good choice for emergency backup food in case of natural disasters and droughts. However, scientists are not sure if it can replace the main crops in other regions.

Although there are belief worries about the growing of the enset in more areas, such as its cultural meaning to the Ethiopian community and the local knowledge needed to properly care for the plant, the enset banana is certainly eye-catching for its unique qualities that have given it the name “the tree against hunger.” It is an example of how food production is changing in our world in the face of climate change.

1. Why is the enset called “false banana”?
A.Because it has orange fruits looked like the banana.
B.Because it belongs to the same family of the banana.
C.Because it is like the banana but its fruit can’t be eaten.
D.Because it can grow up to 10 meters tall just like the banana tree.
2. The writer mentioned “Ethiopia experienced its most serious famine in a century during the 1980s” to show that ________.
A.only Ethiopia plants the enset to make food
B.food made from the enset is good for the body
C.the enset may help solve the food crisis in Africa
D.other parts of Asia should learn to plant the enset
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A.①B.②C.③D.④
4. Which is NOT the reason for choosing the enset banana as emergency backup food?
A.People can eat the enset through the whole year.
B.The enset has a lot to offer to our body and can be stored easily.
C.The enset can survive the changeable climates and in different regions.
D.It has special cultural meaning and once saved Ethiopian people in history.
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On the platform, visitors can role-play and “time travel” to ancient dynasties and talk with eight historical figures (人物). The public can enter the platform through the Digital Dunhuang website and its WeChat program.

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Digital collections cater to (迎合) the habits of young people. They not only protect the cultural relics but also bring the public closer to China’s “excellent traditional culture”, reported Dunhuang Art Institute.

Su Bomin, director of the Dunhuang Academy, told Xinhua that more efforts will be made to discover new forms for showing cultural relics and offer the public cultural experiences to develop Dunhuang culture.

1. On the interactive digital platform for the Mogao Grottoes’ Library Cave, visitors can ________.
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