题目内容：
共用题干第一篇
The National Park Service
America's national parks are like old friends.You may not see them for years at a time,
but just knowing they're out there makes you feel better.Hearing the names of these
famous old friends一Yosemite,Yellowstone,Grand Canyon一revives memories of visits
past and promotes dreams of those still to come.
From Acadia to Zion,369 national parks are part of a continually evolving system.
Ancient fossil（化石的）beds, Revolutionary War battlefields, magnificent mountain
ranges,and monuments to heroic men and women who molded this country are all a part of
our National Park System(N.P.S.).The care and preservation for future generations of
these special places is entrusted（托管）to the National Park Service.Uniformed Rangers,
the most visible representatives of the Service,not only offer park visitors a friendly wave,
a helpful answer,or a thought-provoking history lesson,but also are skilled rescuers,
firefighters , and dedicated resource protection professionals（专业人员）.The National
Park Service ranks also include architects,historians,archaeologists,biologists,and a
host of other experts who preserve and protect everything from George Washington's teeth
to Thomas Edison's wax recordings.
Modern society has brought the National Park Service both massive challenges and
enormous opportunities.Satellite and computer technologies are expanding the educational
possibilities of a national park beyond its physical boundaries.Cities struggling to revive
their urban cores are turning to the Park Service for expert assistance to preserve their
cultural heritage,create pocket parks and green spaces,and re-energize local economies.
Growing communities thirsty for recreational outlets are also working with the NPS to turn
abandoned railroad tracks into bike and hiking trails,as well as giving unused federal
property new life as recreation centers.
To help meet these challenges and take advantage of these opportunities,the National
Park Service has formed partnerships一some dating back 1 00 years,some only months
old一with other agencies,state and local governments,corporations,American Indian
tribes and Alaska Natives,Park Friends groups,cooperating associations,private
organizations and community groups.
What is this passage about?
A:The protection of parks.
B:The National Park service.
C:Challenges and opportunities.
D:Recreational activities.
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