题目内容
（请给出正确答案）
What is the main idea of the passage？
A．The roles of zoos.
B．The development of zoos.
C．The problems with zoos.
D．The roots of zoos.
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（由简答题聘请的专业题库老师提供的解答）
更多“What is the main idea of the passage？A．The roles of zoos.B．The development of zoos.C．The p”相关的问题
A、Import quotas
B、Subsidies for exporters
C、Customs procedures
D、Tariffs
【其它】Passage One Questions 46 to 50 are based on the following passage。 Losing your ability to think and remember is pretty scary。 We know the risk of dementia （痴呆） increases with age。 But if you have memory slips， you probably needn’t worry。 There are pretty clear differences between signs of dementia and age-related memory loss。 After age 50， it’s quite common to have trouble remembering the names of people， places and thing quickly， says Dr。 Kirk Daffner of Brigham and Woman’s Hospital in Boston。 The brain ages just like the rest of the body。 Certain parts shrink， especially areas in the brain that are important to learning， memory and planning。 Changes in brain cells can affect communication between different regions of the brain。 And blood flow can be reduced as blood vessels narrow。 Forgetting the name of an actor in a favorite movie， for example， is nothing to worry about。 But if you forget the plot of the movie or don’t remember even seeing it， that’s far more concerning， Daffner says。 When you forget entire experiences， he says， that’s “a red flag that something more serious may be involved。” Forgetting how to operate a familiar object like a microwave oven， or forgetting how to drive to the house of a friend you’ve visited many times before can also be signs of something going wrong。 But even then， Daffner says， people shouldn’t panic。 There are many things that can cause confusion and memory loss， including health problems like temporary stoppage of Defense against memory loss is to try to prevent it by building up your brain’s cognitive （认知的） reserve， Daffner says。 “Read books， go to movies， take on new hobbies or activities that force one to think in novel ways，” he says。 In other words， keep your brain busy and working。 And also get physically active， because exercise is a known brain booster。 46。 Why does the author say that one needn’t be concerned about memory slips？ A） Not all of them are symptoms of dementia。 B） They occur only among certain groups of people。 C） Not all of them are related to one’s age。 D） They are quite common among fifty-year-olds。 47。 What happens as we become aged according to the passage？ A） Our interaction skills deteriorate。 B） Some parts of our brain stop functioning。 C） Communication within our brain weakens。 D） Our whole brain starts shrinking。 48。 Which memory-related symptom should people take seriously？ A） Totally forgetting how to do one’s daily routines。 B） Inability to recall details of one’s life experiences。 C） Failure to remember the names of movies or actors。 D） Occasionally confusing the addresses of one’s friends。 49。 What should people do when signs of serious memory loss show up？ A） Check the brain’s cognitive reserve。 C） Turn to a professional for assistance。 B） Stop medications affecting memory。 D） Exercise to improve their well-being。 50。 What is Dr Daffner’s advice for combating memory loss？ A） Having regular physical and mental checkups。 B） Taking medicine that helps boost one’s brain。 C） Engaging in known memory repair activities。 D） Staying active both physically and mentally。 20分一题
A、The Canterbury Tales
B、The Second Coming
C、The Waste Land
D、The Lake Isle of Innisfree
Earth Day was the brainchild of Gaylord Nelson, aUnited StatesSenator from Wisconsin. After seeingthe environmental destruction causedby the 1969 oil spill in SantaBarbara, California, Nelson wanted to find a way to raise public consciousnessof the needfor greaterenvironmental protections. The result was the first Earth Day on April 22, 1970. On that day,over 20 million Americans took part in a variety of rallies(集会）， meetings，demonstrations andactivities ， all targetedat highlighting the need for protecting Earth and our environment for future generations. Thousands of colleges and universities alsoparticipated. Members of different groups learnedthey sharedcommon values.
Earth Day was a tremendous success.It hasnow become a global phenomenon. In 1990，for example, over 200 million people in 141 countries were organized to bring environmental issues,especially recycling, to the forefront of global consciousness.Today,Earth Day campaigns continue to publicize important environmental issues,such asglobal warming, dean energy,and recycling.
If you ’ re wondering what you cando to make Earth a better place，participating in Earth Day activities is a greatplace to start- By attending a rally ，meeting, or demon-station, you canlearn about the environmental problems facing our planet. To really make a difference, though, you needto turn the knowledge you gain into action. Volunteering for an environmental group or helping to organize an Earth Day event to educate others is one way to make adifference. More importantly, however, you can make changesin your daily life. Here are a few suggestions：
Conserveenergy andnatural resources!Turn off the lights when you leave a room. Take shorter showers. Turn down the thermostat(恒温器） in winter andturn it up during the summer.
Plant a tree! Treesproduce oxygen and remove carbon dioxide from the air. They will benefit you andfuture generations.
Reduce, reuse,and recycle! The amount of trashhumans produce increaseseachyear. Do your part by reducing the amount of stuff you buy，reusing the stuff you already have, and recycling asmuch as possible.
32. Earth Day was setup in order to______.
A.help California recover from the 1969 oil spill
B.help Nelson realize his dream of becoming a senator
C.remember those who suffered greatly in the oil spill
D.improve the public’s awarenessof environmental protection
What happenedon April 22, 1970, according to the passage？A.Different groups met to discussenvironmental issues
B.Thousands of college studentswent out into the streetsto protest
C.Environmental activists targetedat governments
D.Millions of Americans participated in environmental protection activities
In 1990, Earth Day campaigns focused on publicizing_____？A.recycling
B.clean energy
C.the effects of global warming
D.the benefits of cycling
To make Earth abetter place, you canstart from______.A.demonstrating againstthe government
B.learning more about Earth
C.getting involved in Earth Day campaigns
D.volunteering to teach in schools
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