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A new study suggests that dark markings on the planet Mars represent sand-not water.The research in 2015 suggested that lines on some Martian hills were evidence of water.Yet American scientists now say these lines appear more like dry，flows of sand.If water is present，it is likely to be a small amount.Water in liquid form would be necessary for microbial（微生物的）life.
   NASA，the American space agency，said more research is needed.Michael Meyer is the lead scientist for NASA's Mars exploration programme.He noted that the latest study does not reject the presence of water.But he admitted， "It just may not be as exciting as the idea of rivers going down the sides of cliffs（懸崖）. "
   The new findings come from a team led by Colin Dundas of the United States Geological Survey.His team measured 151 of these lines in 10 areas.Most of the lines end with slopes between 28 degrees and 35 degrees.These measurements are similar to active sand dunes（沙丘）on both Mars and Earth.A small covering of dust that moves and sometimes becomes lighter might help explain the markings.They usually appear in the Martian summertime，and then disappear until the next year.If these lines are dry，this suggests that recent Mars has not had large volumes of liquid water.Dundas and his research team say that many questions remain.
   "I still think that Mars has a great potential for having had life early on in its history，" Meyer said. "As long as that's true，we also have a reasonable possibility of life still being on Mars.It just happens to be cryptic or well hidden. "
   NASA currently has no robotic vehicle-either on Mars or in development-with the ability to climb steep slopes.The lack of such equipment has engineers coming up with ideas like Martian helicopters or planes without pilots.

（1）What do American scientists find on Mars now according to their study？
D
D

A．A lot of little life.
B．An amount of water.
C．Some Martian hills.
D．Dark markings are sand.
（2）When do the markings come out？
B
B

A．In Martian spring.
B．In Martian summer.
C．In Martian autumn.
D．In Martian winter.
（3）What's Meyer's opinion about having life on Mars？
B
B

A．Doubtful.
B．Trustful.
C．Indifferent.
D．Objective.
（4）What does the underlined word "cryptic" in Paragraph 4 mean？
A
A

A．Undiscovered.
B．Strange.
C．Magical.
D．Icy.

【考點】社會；說明文．

【答案】D；B；B；A

【解答】

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發(fā)布：2024/4/20 14:35:0組卷：46引用：3難度：0.5

相似題

1．The British are known for their sense of humour.However，it is often difficult for foreigners to understand their jokes.The main point to remember is that the British often use understatement.
   Understatement means saying less than you think or feel.For example，if someone gets very wet in a shower of rain，he might say. "It's a little damp（潮濕的）outside." Or，if someone is very impolite and shouts at another person，someone else might say， "She isn't exactly friendly." Understatement is often used in unpleasant situation or to make another person look silly.Understatement plays an important part in British humour.
   Another key to understanding British humour is that the British like to make fun of themselves as well as others.They often laugh about the silly and unpleasant things that happen to our everyday life when someone accidentally falls over in the street.They also like to make jokes about people from different classes of society.They like to make jokes about their accents，the way they dress and the way they behave.What's more，the British love to watch comedies about people who do not know how to behave in society.The comedy series Mr Bean is a good example of this kind of humour.Mr Bean is the character created by British actor Rowan Atkinson in 1990.
   Mr Bean doesn't talk often，and instead he uses his body movements and facial expressions to make people laugh.Perhaps what makes Mr Bean so funny is that he does things that adults in the real world cannot do.Mr Bean is popular in many countries around the world because you do not have to speak English to understand the humour.Because of this，many people have become familiar with the British sense of humour.

（1）Why is it difficult for foreigners to understand British jokes？

A．The British often enlarge the fad.
B．British jokes are connected with many different cultures.
C．The British try to make out that something is less important than it is.
D．British jokes are not as funny as jokes in other countries.
（2）How does the author explain understatement？

A．By using examples.
B．By making comparisons.
C．By following time order.
D．By describing a process.
（3）How does Mr Bean make people laugh？

A．By telling funny stories.
B．By making jokes about others' accents.
C．By copying how others behave.
D．By using his body movements and facial expressions.
（4）What can be the best title for the text？

A．British Humour in Comedy
B．Humour in Different Cultures
C．Developing Your Sense of Humour
D．Understanding British Humour
發(fā)布：2024/11/15 2:30:2組卷：27引用：3難度：0.5
解析
2．Every year，thousands of teenagers participate in programs at their local art museums.But do any of them remember their time at museum events later in life？A new report suggests that the answer is yes—and finds that arts-based museum programs are credited with changing the course of alumni's（畢業(yè)生的）lives，even years after the fact.
   The Whitney Museum of American Art，the Walker Art Center and the Museum of Contemporary Art，Los Angeles recently asked researchers to conduct a study to find out how effective their long-standing teen art programs really are.They involved over 300 former participants of four programs for teens that have been in existence since the 1990s.Alumni，whose current ages range from 18 to 36，were invited to find out how they viewed their participation years after the fact.
   Among the alumni surveyed，75 percent of them thought the teen art program experience had the most favorable impact on their own lives，beating the family，school and their neighborhoods.Nearly 55 percent thought that it was one of the most important experiences they'd ever had，regardless of age.And two-thirds said that they were often in situations where their experience in museums affected their actions or thoughts.
   It turns out that participating in art programs also helps keep teens enthusiastic about culture even after they reach adulthood：Ninety-six percent of participants had visited an art museum within the last two years，and 68 percent had visited an art museum five or more times within the last two years.Thirty-two percent of alumni work in the arts as adults.
   Though the study is the first of its kind to explore the impact of teen-specific art programs in museums，it reflects other research on the important benefits of engaging with the arts.A decade of surveys by the National Endowment for the Arts found that the childhood experience with the arts is significantly associated with people's income and educational attainments（成就）as adults.Other studies have linked arts education to everything from lower dropout rates to improvement in critical thinking skills.

（1）Why were the researchers asked to conduct the study？

A．To change the course of alumni's lives.
B．To introduce the art museums.
C．To find out how effective the long-standing teen art programs are.
D．To invite people to participate in the art programs.
（2）What do the figures in Paragraph 3 show？

A．Students are more influenced by the family and school.
B．Teen art programs in museums are highly beneficial.
C．Many teens fail to realize the great value of art programs.
D．Most experiences in museums are boring for today's teens.
（3）What does Paragraph 4 tell us about art programs？

A．They create adults who are culturally aware.
B．They are intended to attract more adults.
C．They are designed to support art museums.
D．They provide many job opportunities for adults.
（4）What do the studies mentioned in the last paragraph have in common？

A．All suggest the need to improve museum programs.
B．All show the growing popularity of art programs.
C．All focus on the link between art and education.
D．All prove the good effects of art education.
發(fā)布：2024/11/15 3:0:1組卷：12引用：2難度：0.5
解析
3．There is more of a connection between food and culture than you may think.On an individual level，we grow up eating the food of our culture.It becomes a part of who we are.Many associate food from our childhood with warm feelings and good memories and it ties us to our families，holding a special and personal value for us.Food from our family often becomes the comfort food we seek as adults in times of frustration and stress.
   On a large scale，traditional food is an important part of culture.It also operates as an expression of culture identity.Immigrants bring it wherever they go，and it is a symbol of pride for their culture and means of coping with homesickness.
   Many immigrants open their own restaurants and serve traditional dishes.However，the food does not remain exactly the same.Some materials needed to make traditional dishes may not be readily available，so the taste and flavor can be different from what they would prepare in their home countries.Additionally，immigrants do not only sell dishes to people from the same countries as them，but to people from different countries.Therefore，they have to make small changes about the original dishes to cater to a wider range of customers.Those changes can create new flavors that still keep the cultural significance of the dishes.
   We should embrace our heritage（傳統(tǒng)）through our culture's food but also become more informed about other cultures by trying their food.It is important to remember that each dish has a special place in the culture to which it belongs，and is special to those who prepare it.Food is a window into culture，and it should be treated as such.

（1）What's the function of food mentioned in the text？

A．To help motivate homesickness.
B．To show national identity.
C．To reflect a country's history.
D．To show a community's superiority.
（2）What does the underlined "it" in Paragraph 2 refer to？

A．The specific traditional food.
B．The national culture.
C．A traditional expression of food.
D．The old-fashioned taste.
（3）Why do some immigrants have to change the original dishes in their restaurant？

A．To attach cultural importance to their dishes.
B．To announce the beginning of their life on foreign soil.
C．To make the dishes popular among customers.
D．To present their own food culture in a new way.
（4）What's the author's attitude towards different food cultures？

A．Negative.
B．Balanced.
C．Unfair.
D．Unchangeable.
發(fā)布：2024/11/14 23:0:2組卷：9引用：1難度：0.5
解析

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