Causes of sandstorms
In desert areas, sandstorms are most commonly caused by either thunderstorm outflows, or by strong pressure gradients（气压梯度）which cause an increase in wind speed over a wide area. In some cases, dust and sand may set a limit to a shallow depth by a low-lying temperature change. 1. Drought is another cause of sand storms. Poor farming practices make dust and sand free of protection from the wind. 2. A sandstorm can transport and carry large amounts of sand. Desert is the key source of sandstorms. Saharan sandstorms have increased abut 10 times during the half century since the 1950’s, causing topsoil loss in nearby countries. In Mauritania, there were just two sandstorms a year in the early 1960’s, but there are 80 a year today.3.
Sand storms have also been shown to increase the spread of disease across the globe. Virus in the dust is blown into the atmosphere by the storms. Some diseases may not be urgent at the very beginning, but they can develop into deadly ones if left untreated. 4.
Sandstorms cause soil loss from the dry lands, doing harm to agriculture. Sandstorms also reduce visibility, affecting airplanes and road transportation. 5.
Dust can also have good effects. Central and South American rainforests get most of their mineral nutrients from the Sahara; iron-poor ocean regions get iron.
A.Effects of sandstorms.
B.Bad results caused by sandstorms.
C.People know little about the effects about sandstorms.
D.In other cases, dust may be blown as high as 6,100 meters high.
E.Dryland farming is one of the most serious practices.
F.For example, a breathing problem can lead to lung cancer, while dry eyes lead to blindness.
G.In addition, sandstorms also discourage visitors from visiting these places, striking tourism.
高一英语七选五中等难度题
Causes of sandstorms
In desert areas, sandstorms are most commonly caused by either thunderstorm outflows, or by strong pressure gradients（气压梯度）which cause an increase in wind speed over a wide area. In some cases, dust and sand may set a limit to a shallow depth by a low-lying temperature change. 1. Drought is another cause of sand storms. Poor farming practices make dust and sand free of protection from the wind. 2. A sandstorm can transport and carry large amounts of sand. Desert is the key source of sandstorms. Saharan sandstorms have increased abut 10 times during the half century since the 1950’s, causing topsoil loss in nearby countries. In Mauritania, there were just two sandstorms a year in the early 1960’s, but there are 80 a year today.3.
Sand storms have also been shown to increase the spread of disease across the globe. Virus in the dust is blown into the atmosphere by the storms. Some diseases may not be urgent at the very beginning, but they can develop into deadly ones if left untreated. 4.
Sandstorms cause soil loss from the dry lands, doing harm to agriculture. Sandstorms also reduce visibility, affecting airplanes and road transportation. 5.
Dust can also have good effects. Central and South American rainforests get most of their mineral nutrients from the Sahara; iron-poor ocean regions get iron.
A.Effects of sandstorms.
B.Bad results caused by sandstorms.
C.People know little about the effects about sandstorms.
D.In other cases, dust may be blown as high as 6,100 meters high.
E.Dryland farming is one of the most serious practices.
F.For example, a breathing problem can lead to lung cancer, while dry eyes lead to blindness.
G.In addition, sandstorms also discourage visitors from visiting these places, striking tourism.
高一英语七选五中等难度题查看答案及解析
As most people know, in the past few years, sandstorms have swept across many cities and areas of North China, polluting the air and disturbing daily lives of human beings. People look dirty and suffer many kinds of illnesses, such as breath difficulty. The sandstorm is such a serious problem that it has not only undermined the industrial and agricultural development of our country but also caused a lot of trouble to the living conditions of the Chinese people. It is expected that effective(有效的) measures should be taken as soon as possible through our joint efforts to limit its occurrence.
So what should we do with the frightening sandstorms? Some experts put forward practical suggestions as follows: For one thing, more funs(基金)ought to be put into tree planting and forest protection so as to keep more water resources within the surface of the earth. For another, governments of all countries should make laws on environmental protection.For example, banning the use of throw-away chopsticks and punishing illegal tree cutting. Scientists should also study and find ways to cut down the degree of its destruction and to improve the whole environment.
How people look forward to sunny days with little breeze(微风)touching their faces now and forever! Nevertheless, I am fully confident that the golden days can come back so long as everyone tried his best to protect natural environment from today on.
1.The underlined word”undermined”(in Paragraph 1)means __________.
A．weakened B．encouraged C．kept D．made
2.From the first paragraph, we can infer _________.
A．China has taken no measures to prevent sandstorms.
B．sandstorms can cause much damage to human beings and their daily lives.
C．the sandstorm is the most dangerous natural disaster to human beings.
D．more sandstorms will happen in the near future in North China.
3.How many ways do some experts put forward to fight against sandstorm?
A．5 B．4 C．3 D．2
4.What’s the author’s attitude towards the situation to sandstorms’ problems?
A．Unconfident B．Optimistic C．Regretful D．Satisfied
高一英语阅读理解中等难度题查看答案及解析
As most people know, in the last few years, sandstorms have swept across many cities and areas of North China, polluting the air and disturbing daily lives of human beings. People look dirty and suffer many kinds of illnesses, such as breath difficulty. The sandstorm is such a serious problem that it has not only weakened the industrial and agricultural development of our country but also caused a lot of trouble to the living conditions of the Chinese people.
Therefore, effective measures should be taken as soon as possible to stop its happening. So how should we deal with the frightening sandstorms?
Some experts offer practical advice as follows: For one thing, more money ought to be put into tree planting and forest protection in order to keep more water on the Earth. For another, government of all countries should make laws on environment protection. For example, banning the use of throw-away chopsticks and punishing illegal tree cutting. Scientists should also study and find ways to lower the grade of its destruction and to improve the environment. As for some schools, education about sandstorms should be spread properly and timely to make more and more people attach great importance to this problem.
How people look forward to sunny days with soft wind touching their faces now and forever! The golden days can come back so long as we try our best to protect the natural environment from today on. And the fact is that what I expect is not just a dream. There are some sweet fruits from the early efforts.
1.What’s the first paragraph mainly about?
A. Bad influences sandstorms bring.
B. Ways to protect the environment.
C. The biggest cause of sandstorms.
D. The fast development of China.
2.How many ways to deal with sandstorms are mentioned by some experts?
A. Two. B. Three. C. Four. D. Five.
3.What can we infer from the text?
A. The damage sandstorms cause can never be avoided.
B. The author has confidence in fighting against sandstorms.
C. The author is unsure about the future of the environment.
D. The improvement of the environment is especially relaxing.
4.What will the author probably write about in the following part?
A. Why people should always carry on with dreams.
B. A bright world with no sandstorms anymore.
C. How to realize our dream to live a happy life.
D. Successful examples of stopping sandstorms.
高一英语阅读理解简单题查看答案及解析
Xinjiang is one of the areas________sandstorms happen most often,________results from a dry climate, vast desert and a strong wind.
A．where; which B．when; that C．where, that D．that; which
高一英语单项填空中等难度题查看答案及解析
Death Valley is one of the most famous deserts in the United States, covering a wide area with its alkali sand Almost 20 percent of this area is well below sea level, and Badwater, a salt water pool, is about 280 feet below sea level and the lowest point in the United States.
Long ago the Panamint Indians called this place “Tomesha”— the land of fire. Death Valley’s present name dates back to 1849, when a group of miners coming across from Nevada became lost in its unpleasantness and hugeness and their adventure turned out to be a sad story. Today Death Valley has been declared（宣告）a National Monument（纪念碑）and is crossed by several well-marked roads where good services can be found easily. Luckily the change created by human settlement has hardly ruined the special beauty of this place.
Here nature created a lot of surprise, almost like the sights on the moon, ever-changing as the frequent（频繁的）wind moves the sand about, showing the most unusual colors. One of the most surprising and variable（多变的）parts of Death Valley is the Devil’ s Golf Course, where it seems hard for one to tell reality from terrible dreams. Sand sculptures（沙雕）stand on a frightening ground, as evening shadows move and lengthen.
1... _______ is the lowest place in the desert.
A. Tomesha B. Death Valley C. Nevada D. Badwater
2... The present name of the valley comes from _______.
A. an Indian name B. the death of the miners
C. the local people D. a National Movement
3... From the passage we can learn that _______.
A. no one had ever known the desert before the miners
B. it’s still not easy to travel across the desert
C. people can find gas-stations, cafes and hotels in the desert
D. people have changed the natural sight of the desert
4.. Devil Golf Course is famous for _______.
A. the frequent wind B. the colors of the sand
C. dream-like sights D. the sand sculptures
5.. From the passage we can see that the writer _______ the Death Valley.
A. appreciates B. is fearful of C. dislikes D. is tired of
高一英语阅读理解简单题查看答案及解析
填空
1.Yesterday I ____ _____ _____ (遭遇) a sandstorm.
2.Deserts are created because people______ ______(砍倒) trees and dig up grass.
3.He_____ ____ ____(放火烧)the houses and hundreds of houses caught fire.
4._____ _______(浏览) magazines to find pictures that you can stick on your poster.
5.Trees ______ _____(吸收) carbon dioxide and give out oxygen.
6.The report shows that we are making some progress but that we need to ________ ________ ___________(做出更大的努力) .
7.His father died, when he was young, and he was______ ______(抚养) by his mother.
8._____ ________(平均) there are twenty boys present every day .
9.I _______ ____(以…结束;最终) spending the night at the airport yesterday.
10.That will cost you 1,000 dollars _____ ______(总共).
高一英语单词拼写中等难度题查看答案及解析
Kitchens are considered one of the most dangerous areas of a home, for children and for seniors. Many more accidents and falls occur in the kitchen. Keeping the kitchen a safe environment isn’t always easy, but it can be accomplished through a series of steps.
Look at the kitchen with a critical eye and realize that what may seem perfectly harmless to you may be a potential threat to your elderly father. Watch out for dangerous objects that you take for granted. This can mean anything from the cookers to the cleaning supplies stored under the sink. Considering elderly parents, safety is the key issue.
As most caregivers of elderly parents know, it is often very difficult to convince your Mom or Dad to change their habits. However, stress the importance of safety whenever possible. If your parent is suffering from a cognitive disorder, remind him or her not to place canned goods in the microwave or be careful with knives that just doesn’t work. It’s up to you to unplug the microwave and to place the kitchen knives in a secured drawer.
Many caregivers of elderly parents hesitate to make such changes because they are afraid of hurting feelings. However, when compared to the alternative, it's best to be firm and make safety a priority. Nevertheless, ensuring elderly parent safety in the house, not just the kitchen, is important. As many elders develop cognitive issues, it may be difficult for him or her to tell between safe and unsafe.
Ensure that any room in the house, especially the kitchen, has safe access for those using canes and walkers. It’s not an easy task, but with a little planning and a developed course of action, you can help make the kitchen one of the safest areas of the house, and not the other way around.
1.What is the main idea of the passage?
A. Keeping elderly parents safe at home.
B. Elderly parents are easily hurt at home.
C. Kitchen is a danger to elderly parents.
D. Avoid using knives in your kitchen.
2.The author stressed kitchen in the passage __________.
A. because elderly parents like to work there
B. because more accidents occurred there
C. because more cookers are dangerous
D. because the kitchen floor is too smooth
3.The author states that __________.
A. you can take everything for granted
B. clean the kitchen as often as possible
C. watch out for dangerous objects in the kitchen
D. you should not make the kitchen a mess
4.What does the third paragraph talk about?
A. Elderly parents are often very stubborn.
B. Most caregivers are rather too careless.
C. Elderly parents should not use microwaves.
D. How to avoid potential dangers exists in the kitchen.
高一英语阅读理解中等难度题查看答案及解析
1.If a poisonous insect has b______ you, it often causes the surrounding areas of your skin to become painful and itchy.
2.Great a______ must be paid to developing education, especially in the poor areas.
3.To b______ a programme means to send it out by radio waves, so that it can be heard on the radio or seen on TV.
4.I’m afraid I have to turn down your i______ to dinner, for I will be attending an important meeting then.
5.Having been r______ not to drive after drinking, some drivers are still trying their luck, which is really dangerous.
6.All the competitors could breathe a sigh of relief at the ending of the ______ (激烈的) competition.
7.The orchestra will be at the Festival Hall tonight, p______ (表演) a selection of works by Russian composers.
8.People often show mercy to those who are worth f______ (原谅).
9.The changes to the book were all made with the author’s p______ (允许).
10.Many college students choose to do part-time jobs so as to gain financial i______ (独立) from their family.
高一英语单词拼写中等难度题查看答案及解析
The Sahara Desert is almost _____ of the US.
A. as big B. the size
C. the area D. the same
高一英语单项填空中等难度题查看答案及解析
It seems to some experts that there are only three commonly-used vedio websites in this area: 56.com, Youku.com, Tudou.com and they_______ 90% of the market.(成都市)
A. make up B. put up C. set up D. take up
高一英语单项填空简单题查看答案及解析