[单选题] 提问人:匿名网友 提问时间:2021-08-24

Though little research has been carried out about how exactly the sunspot will negatively harm the health of the people. ________. So, scientists warn that people going outdoors should be careful to protect their exposed skin and eyes with clothes, umbrellas and sunglasses from the strong sunlight rich in ultraviolet rays.


A .Ionosphere is high above the earth.
B .If the lights in your house keep flickering, blame frequent sunspots.
C .According to a research conducted by the Russian scientists from 1957 to 1960, the frequency of earthquakes can be linked to the movement of the sunspots.
D .A paper published by a North Korea observatory says that sun storms may cause an increase in the incidence of heart disease and skin disease.

提问人:匿名网友 提问时间:2021-08-24

参考答案(由小熊题库网聘请的专业题库老师提供的解答)

请点击↑↑↑ 查看官方参考答案 按钮

习题解析

请点击 查看官方参考答案 按钮

您可能感兴趣的题目


1 .The author says that interpersonal relations should be taught as a required course in every school, along with reading, writing, and mathematics. ________. That is at least as important as how much we know.

A Much of what has been said about strangers also applies to relationships with family members and friends. B He keeps looking over the other person's shoulder, as if hoping to find someone more interesting in another part of the room. C Every time you meet someone in a social situation, give him yo...

题型: 单选题 提问时间: 2021-08-24

2 .Many beginning interviewers are afraid that they are forcing the other person to answer questions and have no right to inquire about his personal secrets. ________. Unless the person really hates being interviewed, he is delighted that somebody wants to interview him.

A This fear is almost 100 percent unnecessary. B This doesn't necessarily mean that it will go well. C Most men and women lead lives that are uninteresting. D Both of you need time to get to know each other.

题型: 单选题 提问时间: 2021-08-24

3 .Doctors believe that secondhand smoke may cause lung cancer in people who do not smoke because nonsmokers often breathe in the smoke from other people’s cigarettes.________. The US Environmental Protection Agency reports that about 53,000 people die in the United States each year as a result of exposure to secondhand smoke.

A The risk is even higher for children who live in homes where both parents smoke. B In the United States,nine million children under the age of five live in homes with at least one smoker. C This smoke is called secondhand smoke. D No one knows for sure why Mr. Gilson has lung cancer.

题型: 单选题 提问时间: 2021-08-24

4 .All children in the United States have to receive an education, but the law does not say they have to be educated at school. A number of parents prefer not to send their children to school. ________. There are about 300,000 home-schoolers in the United States today.

A Critics also say that most parents are not well qualified to teach their children. B In some countries, however, children are educated by their parents. C Learning starts with the children's interests and questions. D Children who are educated at home are known as "home-schoolers."

题型: 单选题 提问时间: 2021-08-24

5 .Home schooling is often more interesting than regular schools, but critics say that home-schoolers are outsiders who might be uncomfortable mixing with other people in adult life. ________. However, most parents don't have the time or the desire to teach their children at home, so schools will continue to be where most children get their formal education.

A Critics also say that most parents are not well qualified to teach their children. B A number of parents prefer not to send their children to school. C Children who are educated at home are known as "home-schoolers." D Others believe they can provide a better educational experience for their child...

题型: 单选题 提问时间: 2021-08-24

7 .Arms. How you hold your arms shows how open and receptive you are to people you meet. If you keep your arms to the sides of your body or behind your back, this suggests you are not afraid of taking on whatever comes your way. ________. If someone upsets you, just cross your arms to show you’re unhappy!

A Outgoing people generally use their arms with big movements, while quieter people keep them close to their bodies. B If you ale feeling down, you normally don’t sit straight, with your shoulders inwards. C However, it will probably still be noticed, and people will know you’re not pleased. D I...

题型: 单选题 提问时间: 2021-08-24

8 .here is a difference between science and technology. ________. Science has to do with discovering the facts and relationships between observable phenomena in nature and with establishing theories that serve to organize these facts and relationships; technology has to do with tools, techniques, and procedures for applying the findings of science.

A Another distinction between science and technology has to do with the progress in each. B We are all familiar with the improper use of technology. C Unlike science, progress in technology must be measured in terms of the human factor. D Science is a method of answering theoretical questions; techn...

题型: 单选题 提问时间: 2021-08-24

9 .The future is much too important to simply guess about, the way the high school students did. ________ by carefully studying the present, skilled businessmen, scientists, and politicians are supposedly able to figure out in advance what will happen.

A The stock market had its worst losses ever B Buildings would rotate so they could follow the sun to take maximum advantage of its light and heat C So experts are regularly asked to predict accurately D The article was written in 1958

题型: 单选题 提问时间: 2021-08-24

10 .The Caribbean Islands form a chain that separates the Caribbean Sea from the rest of the Atlantic Ocean. ________. Many of the islands were formed by the eruption(爆发)of ancient volcanoes(火山).Others are low-lying coral islands that gradually rose from the ocean.

A They are famous for their warm, tropical climate and great natural beauty. B What would you see if you took a cruise to the Caribbean Islands? C They're like a long necklace that stretches between North and South America. D But life on the Caribbean Islands is not always paradise.

题型: 单选题 提问时间: 2021-08-24

 
如有问题 请联系客服
  • 客服微信