某绿化用是洒水车的牵引力不变,所受阻力与车重的关系位Ff=kmg(k为常数),未

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问题:

某绿化用是洒水车的牵引力不变,所受阻力与车重的关系位Ff=kmg(k为常数),未洒水时,车做匀速直线运动,洒水过程中,它的运动将是(  )

A.做变加速直线运动

B.做加速度不为0的匀加速直线运动

C.做匀减速直线运动

D.做加速度越来越大的加速直线运动

考点:滑动摩擦力、动摩擦因数力的合成牛顿第二定律
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按房地产经纪人的活动形式划分,房地产经纪人可以分为( )。

A.咨询房地产经纪人

B.居间房地产经纪人

C.代理房地产经纪人

D.行纪房地产经纪人

E.评估房地产经纪人

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解决我与妈妈之间矛盾的有效方法是[ ]

A、冷处理,暂时不理妈妈

B、向妈妈敞开自己的心扉,让妈妈了解自己

C、与妈妈大叫大喊,一争高低

D、尽量不把自己的事情告诉妈妈

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遗传性痉挛性截瘫可合并

A.视神经萎缩

B.多发性神经病

C.精神发育迟滞

D.共济失调

E.耳聋

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Over the past 20 years, AIDS and war have claimed the parents of 2.4 million Ugandan children.When Alexis Hefley first visited the country,, in 1993, she saw the children’s sorrow, but the former Texas banker also spotted "a world of possibility".She watched as they danced for tourists to earn money, and she had a thought: If people in America could see them perform, they’d support them too.                   

The children’s passion and talent inspired Hefley to work with the kids at an orphanage(孤儿院)in Kampala, the capital city of Uganda, to organize a traveling dance troupe(团).The goals: to give the problems in Uganda a human face, to raise awareness and to raise money.

The first tour touched down at six American cities in 1994.Today, the 22-member troupe, known as the Spirit of Uganda, travels across America every two years.The young performers bring their energy and joy to audiences across the U.S.and help support hundreds of Ugandan orphans back home.Among the young dancers, some earn scholarships to attend the U.S.colleges, and then return to their country to help rebuild it.

Photojournalist Douglas Menuez first photographed the troupe in 2006 -?a project that led to his new book, Transcendent Spirit, from which these images are drawn.At each performance, the dancers’ faces show pure joy, quite an achievement given the hardships they’ve faced."They look to the future, not the past," explains Menuez."They embrace beauty and good in the world." As one dancer puts it, "People think we have lost our parents.We’ve had so many problems.But then they see us perform.They see our smiles.And they learn that life goes on."

小题1:What are the first two paragraphs mainly about?     

A.How miserable Ugandan orphans’ life is.

B.How the dance troupe was set up.

C.How the young dancers earned money.

D.How the orphans lost their parents.|小题2:What do we learn about the Spirit of Uganda?            

A.It was started by a journalist.

B.It travels across the U.S.annually.

C.It consists of two dozen performers.

D.Its dancers have chances to study in the U.S.小题3:In the eyes of Menuez, the young performers are_____. 

A.beautiful

B.talented

C.optimistic

D.humorous小题4:What might be the most suitable title for the passage?      

A.Ugandan orphans turn tragedy into dance

B.Transcendent Spirit: A close look at Uganda

C.AIDS and war are claiming people’s lives

D.Lots of people are helping Ugandan orphans

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经济动员机构在国民经济动员演练中可依法征用(),在演练结束后应当及时归还。

A.物资

B.设备

C.场地

D.人员

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