A sandstorm, also known as a dust storm, is exactly what it sounds like. A very strong windstorm especially in the desert carries clouds of sand or dust that greatly reduces visibility. This wind is usually caused by convection currents (对流气流), which are created by intense heating of the ground, and is usually strong enough to move entire sand dunes. Air is unstable when heated, and this instability in the air will cause higher winds to mix with winds in the lower atmosphere, producing strong surface winds.
Sandstorms can disturb people’s travel, and can sometimes destroy whole roads, and dry flat areas. Similar dust storms can be found on the planet Mars, and are thought to be seasonal. Today, the destruction of forests and too much farming of farmland can lead to sandstorms. Too much use of water resources can also cause sandstorms.
In the United States of America, sandstorms are rare because of the lack of large deserts and more importantly the development of proper agricultural techniques. The last recorded destructive sandstorm in American history was the Dust Bowl, which occurred on July 16, 1971 and was widely recorded by meteorologists (气象学家).
To protect themselves from sandstorms, some people wear protective suits. Special equipment can be fixed in some cars to prevent sand from getting into the engine. Sandstorms can cause coughs, and the sand and dust has also been known to carry “infectious diseases”. Sand particles, unlike dust ones, will block air passages, and cause a person who breathes them in to choke. Dust particles may cause an allergic (过敏的) reaction.
1.Which of the following plays the first part in forming sandstorms?
A．The instability of the sand.
B．The instability of the wind.
C．The intense heating of the ground.
D．The speed of the wind.
2.From the second paragraph, we can learn that at present _______.
A．sandstorms are more often seen on Mars than on Earth
B．sandstorms have led to the lack of clean water resources
C．farming brings more harm than benefits to humans
D．human activities are a major cause of sandstorms
3.The author will most probably agree that ________.
A．there will soon be no sandstorms in the USA
B．humans haven’t thought of any way to deal with sandstorms
C．death caused by sandstorms is increasing all the time
D．humans should make more efforts to stop soil turning into desert
高一英语阅读理解中等难度题
A sandstorm, also known as a dust storm, is exactly what it sounds like. A very strong windstorm especially in the desert carries clouds of sand or dust that greatly reduces visibility. This wind is usually caused by convection currents (对流气流), which are created by intense heating of the ground, and is usually strong enough to move entire sand dunes. Air is unstable when heated, and this instability in the air will cause higher winds to mix with winds in the lower atmosphere, producing strong surface winds.
Sandstorms can disturb people’s travel, and can sometimes destroy whole roads, and dry flat areas. Similar dust storms can be found on the planet Mars, and are thought to be seasonal. Today, the destruction of forests and too much farming of farmland can lead to sandstorms. Too much use of water resources can also cause sandstorms.
In the United States of America, sandstorms are rare because of the lack of large deserts and more importantly the development of proper agricultural techniques. The last recorded destructive sandstorm in American history was the Dust Bowl, which occurred on July 16, 1971 and was widely recorded by meteorologists (气象学家).
To protect themselves from sandstorms, some people wear protective suits. Special equipment can be fixed in some cars to prevent sand from getting into the engine. Sandstorms can cause coughs, and the sand and dust has also been known to carry “infectious diseases”. Sand particles, unlike dust ones, will block air passages, and cause a person who breathes them in to choke. Dust particles may cause an allergic (过敏的) reaction.
1.Which of the following plays the first part in forming sandstorms?
A．The instability of the sand.
B．The instability of the wind.
C．The intense heating of the ground.
D．The speed of the wind.
2.From the second paragraph, we can learn that at present _______.
A．sandstorms are more often seen on Mars than on Earth
B．sandstorms have led to the lack of clean water resources
C．farming brings more harm than benefits to humans
D．human activities are a major cause of sandstorms
3.The author will most probably agree that ________.
A．there will soon be no sandstorms in the USA
B．humans haven’t thought of any way to deal with sandstorms
C．death caused by sandstorms is increasing all the time
D．humans should make more efforts to stop soil turning into desert
高一英语阅读理解中等难度题查看答案及解析
________ is known to everybody, Taiwan is a part of China. We must unify it.
A．It B．As C．Which D．What
高一英语单项填空中等难度题查看答案及解析
_______ is known to all, Lu Xun was famous as a great thinker.
A. Which B. As C. It D. What
高一英语单项填空简单题查看答案及解析
It may be common knowledge that what British people call “football” is known as “soccer” in the US, and “colour” in British English (BrE) goes without the “u” in American English (AmE). But according to a chart made recently by website Grammar Check, these are far from being the only differences between the two countries, use of English. The chart outlined 63 of the main contrasts (对照) between BrE and AmE, from the more well-known “lift/elevator” and “autumn/fall” to the lesser-known “garden/yard” and “petrol/gasoline”.
Some of the vocabulary mismatches are so different that two people in a conversation may fail to understand each other. For example, the two countries have different names for certain food. “Biscuits” and “sweets” in Britain are known as “cookies” and “candies”, respectively, in the US. But while getting food names mixed up only causes puzzle, some misunderstandings may lead to embarrassment (尴尬) if you’re not careful. If a British man in the US is asked to show up a party in “pants”, there’s a chance that he might get a lot of stares from other guests. “Pants” in the UK means underwear. “Trousers” are what you need to ask a British friend to wear if you don’t want them to cause a scene among your friends.
However, even if 63 is already a lot, there are still many differences that the chart failed to cover. If a US girl walks into a UK barber and says “I want to have my bangs fixed’’, for example, it could take a while before the hairdresser realizes what she means is actually her “fringe”.
1.By listing many examples in the first paragraph, the author mainly tells us .
A. BrE and AmE are different in spelling
B. BrE and AmE have a lot of similar words
C. there are many differences between BrE and AmE
D. people are much more familiar with “lift/elevator”
2.The underlined word “respectively” in paragraph 2 means .
A. separately B. both
C. respectfully D. similarly
3.If a British man is asked to attend a party in “pants”, he might .
A. feel uncomfortable or ashamed
B. be attractive among his friends
C. be puzzled at others’ dresses
D. ask for a pair of trousers instead
4.We can conclude from the last paragraph that .
A. the British are slow in understanding
B. the chart includes all the differences
C. the hairdresser doesn’t know “bang”
D. AmE differs quite a lot from BrE
高一英语阅读理解中等难度题查看答案及解析
________is known to us all is that the 2012 Olympic Games will take place in London.
A．It B．What C．As D．Which
高一英语单项填空中等难度题查看答案及解析
_________ is known to us all that the earth is smaller than the sun.
A. It B. What C. As D. which
高一英语单项填空简单题查看答案及解析
______ is known to all，the Amber Room belongs to the Russians.
A．As B．Which C．It D．What
高一英语单项填空简单题查看答案及解析
_____ is known to us that the Amber Room belongs to the Russians.
A.As B.Which C.It D.What
高一英语单项填空困难题查看答案及解析
_____ is known to all that the Amber Room belongs to the Russians.
A．As B．which C．It D．What
高一英语单项填空中等难度题查看答案及解析
_______ is known to all, the 2008 Olympic Games were held in Beijing.
A. It B. As C. That D. What
高一英语单项填空简单题查看答案及解析