题目内容
（请给出正确答案）
42 Sunspots are cooler than the rest of the sun' s surface because
A they produce less energy．
B they are buried in the sun．
C they are far away from magnetic fields．
D they are close to magnetic fields．
安装简答题APP，拍照搜题省时又省心！
更多“42 Sunspots are cooler than th…”相关的问题
Many things in nature, such as sunshine, temperature, and precipitation, affect climate. Nearness to mountain, oceans, and large lakes affects it loo. Another factor is altitude, or height above sea level. Air cools as altitude increases. So a city at a higher altitude may be colder than one at a lower altitude. Finally, winds affect climate. They move heat and moisture between the oceans and continents. Winds keep the tropics from overheating. They keep the polar regions from getting overly cold.
Climate changes over long periods of time. Some scientists think, for example, that the earth' s climate changed at the time of the dinosaurs. They think the dinosaurs died because of the change. What causes a climate to change？ One possible cause may be changes in the sun. Sunspots, for example, are cool, dark spots that form. on the sun. Sunspots may decrease precipitation on the earth and cause unusually dry periods. Changes in the atmosphere may change climate too. Volcanic eruptions, for instance, release solid particles into the air. These particles may form. a cloud that blocks out the sun ' s heat. Human activity is another cause of climate change. Air pollution and the reduction of forest cover may have long-term effects on climate.
This passage is concerned with things that affect______.
A．precipitation
B．climate
C．altitude
D．sunspots
第二节 完型填空
阅读下面短文，从短文后所给各题的四个选项(A、B、C和D)中选出能填入相应空白处的最佳选项。
"Cool" is a word with many meanings. Its traditional meaning is used to【36】a temperature that is fairly cold. As the world has【37】, however, the word has expanded to【38】many different meanings.
"Cool" can be used to express feelings of【39】in almost anything. When you see a brand-new car in the street, maybe you can't help【40】, "It's cool." You might think, "He's so cool," when you see your【41】footballer.
We all enlarge the meaning of "cool". You can use it【42】many words such as "new" or "amazing." Here's an interesting story we can see【43】illustrate the usage of the word: A teacher asked her students to【44】the waterfall they had visited. On one student's paper was just the one【45】, "It's so cool."【46】he thought it was【47】to describe【48】he saw and felt.
【49】the story also proes the shortage of words and expressions.【50】"cool," some people have no words to express the same meaning. So it is【51】to improve our word strength to maintain the【52】of language.
As a popular word, "cool" stands for a kind of special【53】that people can accept easily. Except "cool," can you think of any other words that【54】your life as colorful？ I can. And I think they are also very【55】.
(40)
A．find
B．take
C．show
D．make sure
Sunspots are cooler than the rest of the sun's surface because
A．they produce less energy.
B．they are buried in the sun.
C．they are faraway from magnetic fields.
D．they are close to magnetic fields.
Why does the author mention "blemish," in paragraph 4？
A．To suggest that sunspots are flaws on the surface of the sun.
B．To illustrate that the sun is thought to have a face.
C．To emphasize that sunspots are indicative of illness.
D．To explain that microscopes are strong enough to see sunspots.
Sunspots
It's not surprising that sunspots (太阳黑子) were observed by ancient astronomers (天文学家). The largest sunspots on the sun can be seen without a telescope. It was not until the invention of the telescope (望远镜) in the early 17th century, however, that systematic studies of sunspots could be undertaken. The great astronomer Galileo was among the first to make telescopic observations of sunspots.
Sunspots are regions of extremely strong magnetic fields (磁场) found on the sun's surface. A sunspot has a dark Central core known as the umbra. The umbra is surrounded by a dark ring called the penumbra, where the magnetic field spreads outward. SunSpots appear dark because they are giving off less radiation. They are cooler than the rest of the sun's surface.
Sunspots are frequently observed in pairs or in paired groups. The members of a spot pair are identified as the leading spot and the following spot. They are identified by their position in the pair in terms of the direction in which the sun rotates (旋转).
The number of sunspots at any one time varies. A large spot group may consist of as many as 10 groups and 300 spots across the sun. The number of spots changes in a fairly regular pattern called the sunspot cycle. The largest number occurs about every 11 years. At sunspot minimum, there are at most just a few small spots.
The average lifetime of an individual spot group is roughly one solar rotation, which is about 25 days. The most persistent large spots,' however, can survive for two to three months.
Careful observations and systematic studies of sunspots
A．were made by ancient astronomers.
B．started in the early 17th century.
C．were made by Galileo only.
D．could be made without a telescope.
A．It would determine the extent to which sunspots plays a role in increasing the sun's irradiance.
B．It would help establish whether the data supporting the existence of the Maunder Minimum is reliable.
C．It would allow scientists to establish whether the warming trends owe to industrialization or to natural factors existing prior to industrialization.
D．It could possibly corroborate the information on sunspots provided by satellites.
E．It would establish that sunspots do indeed appear in regular and periodic cycles.
请根据短文内容，回答题。
Sunspots （太阳黑子）
It&39;s not surprising that sunspots were observed by ancient astronomers (天文学家) . The largest sunspots on the sun can be seen without a telescope. It was not until the invention of the telescope (望远镜) in the early 17th century, however, that systematic studies of sunspots could be undertaken. The great astronomer Galileo was among the first to make telescopic observations of sunspots.＜br＞
Sunspots are regions of extremely strong magnetic fields (磁场) found on the sun&39;s surface. A sunspot has a dark central core known as the umbra. The umbra is surrounded by a dark ring called the penumbra, where the magnetic field spreads outward. Sunspots appear dark because they are giving off less radiation. They are cooler than the rest of the sun&39;s surface.＜br＞
Sunspots are frequently observed in pairs or in paired groups. The members of a spot pair are identified as the leading spot and the following spot. They are identified by their position in the pair in terms of the direction in which the sun rotates (旋转) .＜br＞
The number of sunspots at any one time varies. A large spot group may consist of as many as 10 groups and 300 spots across the sun. The number of spots changes in a fairly regular pattern called the sunspot cycle. The largest number occurs about every 11 years. At sunspot minimum, there are at most just a few small spots.＜br＞
The average lifetime of an individual spot group is roughly one solar rotation, which is about25 days. The most persistent large spots, however, can survive for two to three months.
Careful observations and systematic studies of sunspots __________. 查看材料
A.were made by ancient astronomers
B.started in the early 17th century
C.were made by Galileo only
D.could be made without a telescope
第三篇
Sunspots
It's not surprising that sunspots（太阳黑子）were observed by ancient astronomers（天文学家）．The largest sunspots on the sun can be seen without a telescope．1t was not until the invention of the telescope（望远镜）in the early l7th century，however，that systematic studies of sunspots could be undertaken．The great astronomer Galileo was among the first to make telescopic observations of sunspots．
Sunspots are regions of extremely strong magnetic fields（磁场）found on the sun's surface．A sunspot has a dark central core known as the umbra．The umbra is surrounded by a dark ring called the penumbra．where the magnetic field spreads outward．Sunspots appear dark because they are giving off less radiation．They are cooler than the rest of the sun's surface．
Sunspots are frequently observed in pairs or in paired groups．The members of a spot pair are identified as the leading spot and the following spot．They are identified by their position In the pair In terms of the direction in which the sun rotates（旋转）．
The number of sunspots at any one time varies．A large spot group may consist of as many as 10 groups and 300 spots across the sun．The number of spots changes in a fairly regular pattern called the sunspot cycle．The largest number occurs about every 11 years．At sunspot minimum, there are at most just a few small spots．
The average lifetime of an individual spot group is roughly one solar rotation．which is about 25 days．The most persistent large spots, however, can survive for two to three months．
41 Careful observations and systematic studies of sunspots
A were made by ancient astronomers．
B started in the early 17th century．
C were made by Galileo only．
D could be made without a telescope．
A．undetermined
B．insignificant
C．unusual
D．indisputable
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： Astronomers are still learning about sunspots and about their effects on us, but believe that the spots on the sun, which were first observed through a telescope by Galileo in 1610, are electrical in nature.
Sunspots vary in size from what appear to be small specks on the sun's surface, to at least 90,000 miles long, and 200,000 miles in length, and are visible on most clear days.
When sunspots release their electrical energy, they shoot beams of negatively charged electrons into space, some of which escape into the Earth's atmosphere. These electrons create electrical effects, such as the aurora borealis, or Northern Lights, cause the disruption of radio transmissions, and increase the amount of ozone in the upper atmosphere. The additional ozone may absorb more than the usual amount of the sun's heat, which in turn may affect our weather.
The sunspot cycle, is a recurring 11-year period over which the number of sunspots fluctuates and corresponds to the number of sun flares. An increase in the number of sun flares leads to an increase in the number of sunspots, and a decrease in the number of sun flares leads to a decrease in the number of sunspots,
Records of sunspots have only been kept for the last 100 years or so, leaving astronomers with little to back their research and much yet to discover about this phenomenon.
(27)
A．They were created by Galileo in 1610.
B．They are electrical in nature.
C．They are created by nature.
D．They are there for almost thousands of years.
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
微信搜一搜
简答题
微信搜一搜
简答题
如搜索结果不匹配，请 
