请输入或粘贴题目内容
搜题
拍照、语音搜题，请扫码下载APP
题目内容
（请给出正确答案）
44 If an intense sunspot activity had occurred in 1857, the next one would have been in
A 1858．
B 1862．
C 1865．
D 1868．
答案
更多“44 If an intense sunspot activity had occurred in 1857, the next one would have been inA 1”相关的问题
第1题
The purpose of the "special instruments" mentioned in the third paragraph_________.
A．magnify the image of the sun
B．block out the sun's intense light
C．measure the amount of energy emitted by the sun
D．photograph the sun
第2题
A．It reflects little of the sun heat and makes the weather warmer.
B．It reflects much of the sun heat and makes the weather colder.
C．It makes the rain impossible and the weather dry.
D．It makes the light and heat intense at the equator.
第3题
Which statement was NOT mentioned about viewing an eclipse？
A．Sunglasses block out only a limited amount of the sun's ultraviolet rays that can damage the eye.
B．Sunglasses can only filter harmful rays during total solar eclipses at their greatest magnitude.
C．Sunglasses tend to cause the center of the eye to enlarge allowing in more intense light.
D．Sunglasses should be used when any part of the sun is visibl
第4题
听力原文： A country's latitude, or distance from the equator, has an important effect on its climate. In places located at low latitudes, or near the equator, like Ecuador and northern Brazil, the amount of sun shine changes the least during the year. At mid-latitudes, in places like Japan or Argentina, there is more sunshine in the summer than in the winter. The greatest change occurs at the highest latitudes, in places like northern Canada or Alaska. In these places, the nights are very long for half the year, and the days are long during the other half. At the North or South Pole, sunlight lasts the longest during the summer. But light and heat are the most intense at the equator.
Altitude and distance from the sea also affect climate. The thin air in high mountain areas absorbs less of the sun's heat than the thicker air at sea level. The daily changes in temperature also increase with distance from the sea.
Snow and rain are- very important to climate. Snow reflects as much as eighty or ninety percent of the heat from the sun, and makes the weather even colder, but a large forest area can reflect as little as five percent of the sun's heat. This makes the weather warmer.
Of course, the general effects of climate do not explain every thing about the weather. For example, both the driest places in the world and the place with the most rainy days are located in Chile. Calama, in the Atacama Desert, had no rain for over 400 years. But during the year 1916, it rained in Bahia Felix, Chile for 348 days.
(30)
A．At low latitudes.
B．At mid-latitudes.
C．At high latitudes.
D．At high altitudes.
第5题
Latitude and distance from the sea also affect climate. The thin air in high mountain areas absorbs less of the sun's heat than the thicker air at sea level.
The daily change in temperature also increases with distance from the sea.
(30) Snow and rain are very important to climate. Snow reflects as much as eighty or ninety percent of the heat from the sun, and makes the weather even colder. But a large forest area can reflect as little as five percent of the sun's heat. This makes the weather warmer.
Of course, the general effects of climate do not explain everything about the weather. For example, (31) both the driest place in the world and the place with the most rainy days are located in Chile. Calama, in the Atacama Desert. has had no rain for over 400 years. But during the year 1916, it rained in Bahia, Felix, Chile for 348 days.
(30)
A．At low latitudes.
B．At mid-latitudes.
C．At high latitudes.
D．At any latitude.
第6题
第二节 完型填空
阅读下面短文，从短文后所给的[A]、[B]、[C]三个选项中选择能填入相应空白处的最佳选项。
If you are travelling in a train, the things seem to be【41】 backwards. But this is not really true. It is the train that is moving.
It is like the case【42】 the earth and the sun. The sun seems【43】 in the east, move across the sky, and set in the【44】. In other words, the sun seems to travel round the earth. However,【45】 not really true. It is the earth that is turning on【46】 own axis (轴) . The turning of the earth on its own axis is what makes the change【47】 day to night.
The earth also travels round the sun on an unchanging path (路径). As well as the earth,【48】 other planets(行星) of【49】 sizes. These are known as the solar system. The planet nearest the sun is Mercury, and the planet【50】 from the sun is Pluto.
(41)
A．move
B．moved
C．moving
第7题
Question 1 to 5 are based on the following passage.
If you think a high-factor sunscreen(防晒霜)keeps you safe from harmful rays, you may be wrong. Research in this week's Nature shows that while factor 50 reduces the number of melanomas(黑瘤)and delays their occurrence, it can't prevent them. Melanomas are the most aggressive skin cancers. You have a higher risk if you have red or blond hair, fair skin, blue or green eyes, or sunburn easily, or if a close relative has had one. Melanomas are more common if you have periodic intense exposure to the sun. Other skin cancers are increasingly likely with long-term exposure.
There is continuing debate as to how effective sunscreen is in reducing melanomas—the evidence is weaker than it is for preventing other types of skin cancer. A 2011 Australian study of 1,621 people found that people randomly selected to apply sunscreen daily had half the rate of melanomas of people who used cream as needed. A second study, comparing 1,167 people with melanomas to 1,101 who didn't have the cancer, found that using sunscreen routinely, alongside other protection such as hats, long sleeves or staying in the shade, did give some protection. This study said other forms of sun protection—not sunscreen—seemed most beneficial. The study relied on people remembering what they had done over each decade of their lives, so it's not entirely reliable. But it seems reasonable to think sunscreen gives people a false sense of security in the sun.
Many people also don't use sunscreen properly-applying insufficient amounts, failing to reapply after a couple of hours and staying in the sun too long. It is sunburn that is most worrying-recent shows five episodes of sunburn in the teenage years increases the risk of all skin cancers.
The good news is that a combination of sunscreen and covering up can reduce melanoma rates, as shown by Australian figures from their slip-slop-slap campaign. So if there is a heat wave this summer, it would be best for us, too, to slip on a shirt, slop on(抹上)sunscreen and slap on a hat.
1.What is people's common expectation of a high-factor sunscreen？
A.It will delay the occurrence of skin cancer.
B.It will protect them from sunburn.
C.It will keep their skin smooth and fair.
D.It will work for people of any skin color.
2.What does the research in Nature say about a high-factor sunscreen？
A.It is ineffective in preventing melanomas.
B.It is ineffective in case of intense sunlight.
C.It is ineffective with long-term exposure.
D.It is ineffective for people with fair skin.
3.What do we learn from the 2011Australian study of 1,621 people？
A.Sunscreen should be applied alongside other protection measures.
B.High-risk people benefit the most from the application of sunscreen.
C.Irregular application of sunscreen does women more harm than good.
D.Daily application of sunscreen helps reduce the incidence of melanomas.
4.What does the author say about the second Australian study？
A.It misleads people to rely on sunscreen for protection.
B.It helps people to select the most effective sunscreen.
C.It is not based on direct observation of the subjects.
D.It confirms the results of the first Australian study.
5.What does the author suggest to reduce melanoma rates？
A.Using both covering up and sunscreen.
B.Staying in the shade whenever possible.
C.Using covering up instead of sunscreen.
D.Applying the right amount of sunscreen.
第8题
Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space______(51) the solar energy increases. The release of the energy______ (52) place along with the activity of the sunspots with a cycle of: 11 years. This time, the______ (53) of the storm exceeded expectations.
This______(54) of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日冠) on October 28, 2003. Large amounts of charged particles moved 150,000,000 kilometers through space toward the ______(55) in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will______(56) some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is______(57) because it is under the protection of the earth's magnetic field.
A solar storm not only affects aircraft but also is a ______(58) to the environment and humans. The aerosphere and magnetic field of the earth can______(59) humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can______(60) the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two______(61) of the earth, which affects electricity supply of North America. Overexposure to______(62) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it______(63) we receive ten times the X-ray radiation. It's really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth______(64) a cold. Though this natural force is irresistible, scientists can still______(65) its movement accurately by monitoring. Facing successive solar storms, humans can't drop their guard.
A．since
B．when
C．until
D．though
第9题
Solar Storm
At the end of October 2003, a sudden solar storm hit the earth. A solar storm refers to the large amounts of charged particles released into space(51)the solar energy increases. The release of the energy(52)place along with the activity of the sunspots with a cycle of 11 years. This time, the(53)of the storm exceeded expectations.
This(54)of intense solar storm was caused by the eruption of a solar flare (闪光) and the ejection (喷发) of the solar corona (日冠) on October 28, 2003. Large amounts of charged particles moved 150,000,000 kilometers through space toward the(55)in 19 hours. They could affect aircraft roaming (漫游) in space.
The high-energy particles will(56)some of the parts of an aircraft. They may also cause it to fail. High-energy particles can threaten the safety of an aircraft at a high orbit. If an aircraft orbits at a lower orbit, it is(57)because it is under the protection of the earth's magnetic field.
A solar storm not only affects aircraft but also is a(58)to the environment and humans. The aerosphere and magnetic field of the earth can(59)humans from ultraviolet radiation and X-rays. While most of the X-rays are absorbed after they enter the aerosphere (大气层), still a few can(60)the ground.
The geomagnetic storm caused by this round of solar storm reaches its highest level on the two(61)of the earth, which affects electricity supply of North America. Overexposure to(62)threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during such a solar storm, it(63) we receive ten times the X-ray radiation. It's really damaging.
Scientists say a solar eruption is like the sun sneezing, which will make the earth(64)a cold. Though this natural force is irresistible, scientists can still(65)its movement accurately by monitoring. Facing successive solar storms, humans can't drop their guard.
A．since
B．when
C．until
D．though
第10题
根据下列文章,请回答 51～65 题。
Solar Storm
At the end of October 2003, A sudden solar storm hit the earth. A solar storm refers to the large a mounts of charged particles released into space __________ (51) the solar energy increases. The release of the energy __________ (52) place along with the activity of the sunspots with A cycle of 11 years. This time, the __________ (53) of the storm exceeded expectations.
This __________ (54) of intense solar storm was caused by the eruption of A solar flare (闪光) and the ejection (喷发) of the solar coron A(日冠) on October 28, 2003. Large a mounts of charged particles moved 150,000,000 kilometers through space toward the __________ (55) in 19 hours. They could a ffect aircra ft roa ming (漫游) in space.
The high-energy particles will __________ (56) some of the parts of an aircra ft. They may also cause it to fail. High-energy particles can threaten the sa fety of an aircra ft at A high orbit. If an aircra ft orbits at Alower orbit, it is __________ (57) because it is under the protection of the earth's ma gnetic field.
A solar storm not only a ffects aircra ft but also is a __________ (58) to the environment and humans. The a erosphere and ma gnetic field of the earth can __________ (59) humans from ultra violet radiation and X-rays. While most of the X-rays are absorbed a fter they enter the a erosphere (大气层), still A few can __________ (60) the ground.
The geoma gnetic storm caused by this round of solar storm reaches its highest level on the two __________ (61) of the earth, which a ffects electricity supply of North America . Overexposure to __________ (62) threatens the health of passengers on planes flying over the Polar Regions. If we fly in the sky during suchA solarstorm, it __________ (63) we receive ten times the X-ray radiation. It's really da ma ging.
Scientists say A solar eruption is like the sun sneezing, which will make the earth _________ (64) A cold. Though this natural force is irresistible, scientists can still _________ (65) its movement accurately by monitoring. Facing successive solar storms, humans can't drop their guard.
第 51 题
A．since
B．when
C．until
D．though
