题目内容

Events at Brown

12:00 PM—1:00 PM,March 1,2017

"I had no ideal"—Export Control Brown Bag (4-part series)

Horace Mann House,Room 103,47-49 George Street

Brown's Office of Research Integrity (ORI) is hosting a 4-part Brown Bag series on “Export Controls at the University”.Export Controls are federal government laws and regulations.The series will explore when research activities fall under Export Control laws,why “fundamental research”is so important,and why traveling to sanctioned(被制裁的)or embargoed(被禁运的)countries,such as Iran or Cuba,still presents a lot of challenges.The first session,“I had no idea!”,will explore why export controls cannot be ignored at a university campus.

The sessions are open to the entire Brown community.Booking in advance is required: juliane_blyth@brown.edu

4:00 PM—5:00 PM,March 1,2017

JCB Weekly Afternoon Talk

John Carter Brown Library,Reading Room,94 George Street

Informal weekly afternoon presentation in the MacMillan Reading Room at the John Carter Brown Library (JCB).Fellows in Residence will give a talk on their current research project.Q & A session follows,along with a display of relevant items from our collection.All are invited to attend this free,weekly event.

6:30 PM—7:30 PM,March 1,2017

Brow Amateur Radio Club Meeting

Sayles Hall.Room 305,79-81 Waterman Street

The weekly meeting of the Brown Amateur Radio Club.All are welcome to attend and learn more about radio and join the club—no license required!

8:00 PM-9:00 PM,March 1,2017

Athletes in Action Prime Time Gathering

Pembroke Field House,449-451 Brook Street

Join your fellow Brown University athletes to learn more about faith,sport,and life.Through guest speakers, team building activities,and small group discussions,we explore the intersection(交集)of the spiritual and the physical in order to maximize our potential.

We meet every Thursday 8-9 pm in Pembroke Field House.There are new athletes that attend every week,and most likely you'll know a number of them already since there are many different teams represented.Hope to see you there!

1.Which event can be beneficial to those who do international research?

A. “I had no idea!”—Export Control Brown Bag

B. JCB Weekly Afternoon Talk

C. Brown Amateur Radio Club Meeting

D. Athletes in Action Prime Time Gathering

2.What will those who attend the JCB Weekly Afternoon Talk do?

A. Meet at Sayles Hall. B. Charge entrance fees.

C. Share their research. D. Collect relevant items.

3.What can you do in the Athletes in Action Prime Time Gathering?

A. Play basketball with new athletes. B. Discuss your potential.

C. Play games to develop teamwork. D. Watch new athletes play games.

4.Where would you be most likely to find the text?

A. In a travel guidance. B. On a university website.

C. In an academic magazine. D. In a local newspaper.

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We all have an idea about the common types of environmental problems. 1.But, the fact is, it does affect mankind, other living forms and the environment as a whole.

What is light pollution? 2.The obvious cause of light pollution is the use of outdoor lighting products improperly. It can be office lighting, car headlights, station lights, streetlights and many more.

3.Upon studies, it is found that obvious effects are observed in the behaviour of night animals, for bright light at night makes it difficult for these animals to hunt, wander and perform their regular activities. light pollution is directly or indirectly responsible for causing several plant diseases. Its effects are related to disturbance in the physical rhythm, which contributes to risks of developing cancer cells. So, it’s nothing less than a threat to human health.

You have already seen the negative effects of light pollution on creatures. Apart from this, the actual cost of misused light is about millions of dollars every year. It also leads to the release of greenhouse gases and global warming4.

While outdoor lighting and using man-made lighting products are part of our modern lifestyle, some simple ways will surely help in reducing light pollution. For example, while installing outdoor lighting, make sure that they are pointed downwards5. Believe it or not, many people living in the urban areas cannot view clear sky and stars at night. Let’s contribute our part in reducing the pollution.

A. Light pollution is harmful to both animals and plants.

B. It presents all forms of misused man-mad light.

C. After all, fuels are used for producing electricity

D. Also, use only the required lighting equipment for both home and offices.

E. Citizens should be forbidden to install outdoor lighting

F. Light pollution affects animals’ normal activities in the daytime.

G. However, light pollution may be a new term to many of us.

Now a group of scientists, including ones from CalTech, MIT and the LIGO Scientific Collaboration finally found the gravitational waves(引力波).They announced they were able to see ripples(波纹) in the structure of spacetime.

What are these gravitational waves? Well, imagine throwing a rock into a pond. When the rock hits the flat surface of the water, it creates ripples. Spacetime is like the surface of the water. So gravitational waves are like the ripples moving out from where the rock hits the water.

It was Einstein who said these gravitational waves should be observable. But these are not huge waves. They are smaller than the size of an atom, which is why it took so long to find them.

Since 2002, scientists have been watching for these gravitational waves, using a giant scientific tool called LIGO. They have been watching two black holes in another galaxy(星系) faraway. The two were spinning around each other, moving closer and closer together. When they finally crashed into each other, gravitational waves were caused. With great power and force, they rang throughout the universe, like a giant bell. Those waves, traveling at the speed of light, finally reached the Earth, some 1.3 billion years later. The National Science Foundation said that each of the black holes was 29 to 36 times the mass of our sun.

This discovery means our understanding of the heavens has changed greatly.

1.The author explains the gravitational waves by ________.

A. presenting recent research findings

B. drawing a vivid picture

C. comparing them to something familiar

D. using proper examples

2.According to the author, finding the gravitational waves means ________.

A. there is a better way to deal with physics problems

B. we have a better understanding of the universe

C. we have reached a new level in earth studies

D. there exists another galaxy in the universe

3.What does the word “they” in Paragraph 4 refer to?

A. The black holes.

B. The gravitational waves.

C. The scientific tools.

D. The galaxies.

4.This passage mainly talks about ________.

A. a new theory of gravitational waves opposite to Einstein’s

B. a description of the scientific research on black holes

C. the relationship between black holes and gravitational waves

D. the discovery of gravitational waves Einstein believed observable

Nowadays there seems to be an app for everything. And mobile apps have been a part of our life. The following apps are part of the most popular apps.

Ctrip can be the best helper when you feel it hard to buy the train or airline tickets. You can buy tickets anywhere at anytime.

Ximalaya Reading has millions of books including poems, short stories, novels and even fairy tales for children. What’s special about it is that you can use it to download book recording that can be listened to. It has more than 1 million valuable resources.

Baby Bus is a very good friend for children under three years old. Kids can learn to speak, understand numbers and draw pictures with the help of this app.

Word Hero may help learn more English words while you’re playing games, so if you have problems remembering the new words when you learn English, use it!

World of Tanks Blitz(坦克世界), a free-to-play online: game with over 40 million downloads, bring quick-fire tank fights. “A lot of tanks, a lot of people and a lot of fun.” It will be the best choice to kill your time.

1.Ctrip is a useful app for .

A. playing games

B. learning English

C. booking tickets

2.You can NOT know about from Ximalaya Reading.

A. poems B. novels C. news

3.To remember words in a fun way, is a good choice.

A. Ctrip B. Word Hero C. Baby Bus

4.World of Tanks Blitz has downloads and it fits people’s free time.

A. more than 40 million

B. less than 1 million

C. more than 40 billion

5.According to the information above, .

A. we can buy tickets from Ctrip only in the daytime

B. Peter, a 2-year-old boy, can learn to draw pictures with the help of Baby Bus

C. we can’t use Ximalaya Reading to download book recording

The St. Louis Post-Dispatch reported that the St. Louis Outlet Mall is expanding its restrictions on unaccompanied teenagers. In 2006, a parental-escort (陪同)policy was established: on Fridays and Saturdays starting at 6 p.m., anyone under 17 that isn’t accompanied by a guardian who is at least 21 years old will be kicked out of the mall. It was around this time that other malls around the U.S. likewise banned unaccompanied teens during certain evening hours.

Starting from this Friday, the St. Louis Outlet Mall is pushing its parental-escort rule back to 3 p.m. on Fridays and Saturdays. Similarly, the Mall of America expanded its parental-escort policy during the recent holiday shopping season. Normally, the policy bans kids under 16 without guardians(监护人) from 4 p.m. until closing time just on Fridays and Saturdays. But because of a fight in the mall involving dozens of young people that took place on Dec. 18, 2012---- a weekday, the policy was broadened to include peak 2013 holiday shopping hours, including Thanksgiving Day and all of the Christmas week.

Teen disturbances in other malls may cause more shopping centers to introduce or expand parental-escort policies. The Indianapolis Star noted that two incidents in 2013 in area shopping centers raised the possibility that Indianapolis malls might need to consider banning unaccompanied teenagers.

Obviously, such bans are aimed at stopping violence and other outbursts involving teenagers. More importantly, from a purely business perspective, these bans aim to attract shoppers who might otherwise be hesitant to go to the mall because of concerns about violence and outbursts involving teenagers. The restrictions allow mall security officers to systematically kick out a group of people that are considered to be loud, thuggish and bad for business overall. But they attract much criticism from online communities. Some argue that teens have the right to shop without a guardian. “Not all teens are disrespectful and troublemakers,” Pamela Chapman wrote. “In fact, it’s been my experience that most are good kids.”

Again, the biggest influence on stricter mall policies for teens seems to be that they’re just plain good for business. Malls reported strong sales growth after they first carried out the policies six years ago. “We’ve had some success with the parental-escort policy, and families like shopping out here together,” the manager of the St. Louis Outlet Mall told the St. Louis Post-Dispatch . If there’s one rule in retail, it’s this---- if a small initiative proves successful in boosting sales, then it’s all but guaranteed that a larger initiative will follow.

1.What made malls restrict unaccompanied teenagers?

A. Teenagers’ disturbances.

B. Teenagers’ safety.

C. Limited holiday shopping hours.

D. Teenagers’ potential purchasing power.

2.What might be Pamela Chapman’s attitude towards the parental-escort policy?

A. Unconcerned. B. Skeptical.

C. Opposed. D. Positive.

3.The manager of the St. Louis Outlet Mall seemed to believe the parental-escort policy ______.

A. was temporary B. helped increase sales

C. was unfair to teenagers D. discouraged some families

4.What is the passage mainly about?

A. Violent incidents happening in St. Louis.

B. Malls’ bans on unaccompanied teens.

C. Security measures at American malls.

D. Parents’ duty to protect teenagers.

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