1、选择性必修 第二册 Unit 1 同步练习 (限时：35分钟).阅读理解AThe New York Botanical Garden is a good place for camps.Scienceand naturethemed camps for kids in Grades K8 include outdoor explorations, science investigations, and behindthescenes tours in the Gardens 250acre scenery.Each week takes full advantage of the Garden
2、s vast plant collection, stateoftheart technology, and unique habitats (栖息地) like the 50acre native forest, wetlands, and Native Plant Garden.Winter Break CampThe science and nature camps for kids in Grades K5 will run concurrent (并存的) sessions by age groups.With the help of the instructors in separ
3、ate spaces, kids will take part in some indoor activities based on their age and learning level, such as learning to make handicrafts and grow plants.Time: February 1821, 2021, 9 am3 pmFee: $240Spring Break CampThe Everett Childrens Adventure Garden is a good place for kids on Spring Break.Choose am
4、ong several different day campsoffering exciting and educational opportunities to children entering Grades K5 in Spring 2021.Time: April 1317, 2021, 9 am3 pmFee: $300Culinary (烹饪的) and Art CampsWeeklong camps will teach kids how to paint and prepare a meal, which is sure to help develop kids confide
5、nce.In order to ensure availability for all camp families, this camp participation is limited to three weeks per camper.Time: August 321, 2021，9 am3 pmWeekly: $315 Summer Field Science CampsDo you have a teen who loves spending time outdoors and working in teams? Children will learn more about the p
6、lants and animals in the Garden and go behind the scenes to find out about field research happening at the Garden.Sign up for a single week or a series of weeks.Time: August 321，2021，9 am4 pmWeekly: $3503Week Summer Session: Save 10% when you register for all 3 weeks.1What can we learn about the Win
7、ter Break Camp?AIt has only one section at a time.BThe camp will last for a whole week.CAll the children study at the same place.DActivities will be designed by kids grades.2Which of the following camps lasts the shortest time?AWinter Break Camp.BSpring Break Camp.CCulinary and Art Camps.DSummer Fie
8、ld Science Camps.3How much will a child pay for the complete session of Summer Field Science Camps?A315 dollars.B350 dollars.C945 dollars.D1，050 dollars.BThousands of satellites have been launched into space by humans since the first satellite was launched in 1957.The satellites serve many useful pu
9、rposes.Some are an important part of communications networks, like cellphones, TV, and the Internet.Others are used to track weather and climate information, create maps of the earth, operate navigation (导航) systems like GPS, and take photos of the earth, the sun, other planets and deep space.Right
10、now, there are about 1，000 artificial satellites orbiting the earth.The International Space Station (ISS) is also a kind of satellite, with room for people to live on it.SpaceX, the American technology company, began launching groups of satellites in 2019 and launched 60 satellites into space on Jan
11、uary 29, 2020.SpaceX plans to create a network of 12，000 satellites first.It says that the network, known as Starlink will help provide better Internet service for remote parts of the world.However, astronomers say the growing number of satellites orbiting the earth is causing a problem.Satellites a
12、re made of metal that reflects sunlight.This makes them show up in the night sky as bright, slowmoving dots.The Starlink satellites take three to five minutes to cross the viewing area of a telescope.During that time, they may pass directly in front of the object an astronomer is trying to look at,
13、hiding it from view.Besides, the light from the satellites is so bright that it makes it impossible to see the weaker light of distant stars and planets.Large groups of satellites like the Starlinkknown as “satellite constellations (卫星星座)” give off radio signals of their own and reflect radio waves
14、coming from the earth.These extra signals interfere with radio waves coming from places further away in the galaxy.While it might be possible to build satellites with surfaces that dont reflect light, making satellites that dont interfere with radio waves is a different story.There are no rules abou
15、t who can launch a satellite, or how many satellites can orbit the earth at one time.The International Astronomical Union (IAU), a group made up of professional astronomers worldwide, wants to work with the companies that design and launch satellites and the governments that make laws and regulation
16、s.They say it is important to study the impact of having so many satellites and to make rules to protect the night sky.4What does the first paragraph mainly talk about?AHumans ambition to launch satellites.BThe various functions of artificial satellites.CHumans achievements in space exploration.DThe
17、 difference between satellites and the ISS.5What is the problem of the Starlink satellites according to the astronomers?AGiving off too much light.BMoving too slowly in space.CBadly affecting the study of space.DAlways hiding themselves from view.6What does the author try to convey in the last parag
18、raph?AThat people shouldnt abuse outer space.BThat the IAU will stop launching satellites.CThat astronomers arent in favour of exploring space.DThat the companies should work with the governments.7What is the structure of the text?ABC DCLots of ancient treasures have been uncovered by researchers on
19、 the island, Chrysi, which was devoted to making a precious purple dye (染料) from sea snails thousands of years ago.The researchers found plenty of shells of sea snails in several small buildings in the settlement of Minoans (属于米诺斯文化的克里特人) on Chrysi those sea snails are called murexes, which have the
20、 purple substance (物质) in their bodies.In the large building, researchers found ancient work desks, stoves, buckets, a stone staircase and precious jewels and metals.These things suggest that people in the large building managed the settlements production of the purple dye and the trade with buyers
21、who visited the island by ship.The buyers paid for the goods using precious metals and jewelry.Researchers have studied the Minoans settlement on Chrysi since 2008, having many discoveries, including the remains of large carved stone tanks near the waterline on the beach.Based on their earlier work,
22、 researchers suspect that the tanks were used to farm the sea snails, murexes, to increase their numbers and reduce the work of harvesting them from the sea.When murexes grew up in the tanks, they were probably used by the Minoans to produce the purple dye.Researchers say the Minoans on Chrysi made
23、the purple dye from murexes about 4，000 years ago.But some people dont believe that the purple dye was made from murexes on Chrysi at that time.They state, “Why didnt those ancient people use cheaper plants to produce the purple dye？” Deborah didnt think so.He told Live Science, “Through our study,
24、cheaper plant substitutes did not come around until the Middle Ages (5 AD15 AD).And the purple dye produced by the ancient Minoans had many characteristics similar to the purple substance inside murexes bodies.”Murexes can make a small amount of the purple substance inside their bodies, using it as
25、a poisonous defense against other creatures.It takes thousands of the sea snails to produce enough purple dye to color a single dress.Its a difficult and sometimes dangerous task.There was danger and discomfort involved in harvesting these creatures.Strength was required to break open their shells,
26、and the smell was terrible.8.The discoveries in the large building show that Chrysi _Awas the first island to make the purple dyeBproduced different dyes from plantsCmight have a relatively developed economyDwitnessed the Minoans fight against outsiders9Stone tanks on Chrysi were likely built to _Ac
27、ollect drinking waterBmake murexes more availableCkill murexes caught in the seaDhelp color the cloth and other objects10What did Deborah try to express in her words?APeople can gain the purple dye from plants.BThe Minoans farmed murexes mainly to sell their meat.CSome people doubt the source of the
28、 Minoans purple dye.DThe Minoans gained the purple dye most possibly from murexes.11What can we learn from the Minoans process of gaining the purple dye?AThe Minoans were not encouraged to go to sea.BThe purple dye made by Minoans might be valuable at that time.CThe task of catching murexes on the s
29、ea can be fun.DThe purple dye might be unpopular with many Minoans.DMath anxiety is an annoying fear of math, and it affects the classes college students select and the careers they pursue.As a cognitive (认知的) scientist, I am concerned that it prevents students who otherwise have the ability to succ
30、eed in STEM (Science, Technology, Engineering and Mathematics) from doing so.Math anxiety starts at a young age for both sexes.My research team found that as early as the first and second grade, nearly half of students indicate they are “moderately nervous” to “very, very nervous” about math.A quart
31、er of students attending fouryear colleges experience moderate or high levels of math anxiety.And one study found that, for 11% of American university students, the anxiety is so severe that they have to seek for counsel.Sadly, the US.Bureau of Labor Statistics indicates that employment in mathheavy
32、 positions will escalate by 28% by 2026.It is much faster than the average for all careers.However, my own research and other studies show that we are not doing enough to address math anxiety.How do we solve the problem and ensure young Americans pursue opportunities that qualify them for STEM jobs
33、of the future? We can work to bring math to those who might shy away from it.Requiring that all students take courses that push them to think empirically (以经验为主地) with data, regardless of the major, is one such approach.Employers should encourage applications from college students with diverse educa
34、tional interests in their STEMrelated internships (实习).Dont only seek for the computer science majors.This means potentially taking a student who doesnt come with all the computation skills in hand but does have a good attitude and willingness to learn.Then they can provide advanced math and computa
35、tional training for those college students as part of career development.Moreover, we need to reject the social acceptability of being bad at math.You do hear many people talking about “not being a math person”When we repeat negative feelings like that to ourselves and each other, we fear math more.
36、12What makes the author worried according to Paragraph 1?AThat there are few STEMrelated majors.BThat the fear of math will lead to severe math anxiety.CThat college students fail to select proper professions.DThat students fear of math prevents their success in STEM.13What did the authors research
37、team find?AMath anxiety is common at all age levels.BGirls tend to perform better in math than boys.CCollege students can overcome their math anxiety.DMath anxiety can be classified into different degrees.14What does the underlined word “escalate” in Paragraph 3 mean?AImprove. BIncrease.CDrop. DReco
38、ver.15What does the author advise employers to do?AOffer students free STEMrelated internships in colleges.BAssist colleges in improving students computation skills.CWelcome students with different majors to work for them.DProvide students with chances to develop their interests.阅读七选五For many people
39、, the costs associated with a daily commute (通勤) to a distant work site can be annoying.If children are involved, then there are the added expenses of professional childcare while the parents are at work._16_Some athome jobs are extensions of household duties already being performed, such as laundry
40、 services, childcare and food preparation.Athome parents with suitable skills can operate their own daycare centers for the working parents, for instance._17_ So it is an ideal homebased business for experienced parents.Some athome jobs can be more creative in nature, such as the creation of special
41、ty (特色) crafts or foods. Some people who prefer to work out of their homes will spend their time creating marketable craft or food items during the week and either sell them directly on weekends or send them to established business for retail sale._18_19_ Some workers can receive his or her assignme
42、nts through email, process the files and upload the finished work back to the company through a secure Internet connection.Telecommuting is sometimes an ideal solution for those who prefer to work in a standard office environment._20_ They consider doing athome jobs as satisfying as making the long
43、daily commute to the office.ACompetition for online jobs can be severe.BThe young, in particular, prefer to do jobs at home.CChildcare services are often in great demand these days.DOne solution growing in popularity is to do jobs at home.EHowever, there are people who are willing to do jobs at home
44、.FOther athome jobs today are generally more technical in nature.GMeanwhile, many people choose to market their homemade products online.选择性必修 第二册 Unit 1 同步练习 (限时：35分钟).阅读理解AThe New York Botanical Garden is a good place for camps.Scienceand naturethemed camps for kids in Grades K8 include outdoor ex
45、plorations, science investigations, and behindthescenes tours in the Gardens 250acre scenery.Each week takes full advantage of the Gardens vast plant collection, stateoftheart technology, and unique habitats (栖息地) like the 50acre native forest, wetlands, and Native Plant Garden.Winter Break CampThe
46、science and nature camps for kids in Grades K5 will run concurrent (并存的) sessions by age groups.With the help of the instructors in separate spaces, kids will take part in some indoor activities based on their age and learning level, such as learning to make handicrafts and grow plants.Time: Februar
47、y 1821, 2021, 9 am3 pmFee: $240Spring Break CampThe Everett Childrens Adventure Garden is a good place for kids on Spring Break.Choose among several different day campsoffering exciting and educational opportunities to children entering Grades K5 in Spring 2021.Time: April 1317, 2021, 9 am3 pmFee: $
48、300Culinary (烹饪的) and Art CampsWeeklong camps will teach kids how to paint and prepare a meal, which is sure to help develop kids confidence.In order to ensure availability for all camp families, this camp participation is limited to three weeks per camper.Time: August 321, 2021，9 am3 pmWeekly: $315 Summer Field Science CampsDo you have a teen who lo
