铝合金型材间的相互连接件:一般采用铝角件连接法,铝角件通常分为()mm和()mm厚铝

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铝合金型材间的相互连接件:一般采用铝角件连接法,铝角件通常分为()mm和()mm厚铝角。

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如图,在△ABC中,AB的垂直平分线交AC于D,若AC=5cm,BC=4cm,则△BDC的周长为(    ).

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下列说法正确的是(    )

A.物质的溶解性为难溶,则该物质不溶于水

B.不溶于水的物质溶解度为0

C.绝对不溶解的物质是不存在的

D.某离子被沉淀完全是指该离子在溶液中的浓度为0

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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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免疫组化抗体稀释液中加入BSA(牛血清清蛋白)或正常动物全血清是为()

A.促进抗原抗体反应

B.减少抗体的非特异性吸附

C.保护抗原活性

D.保护标记酶活性

E.提高IHC的敏感性

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下列哪些属于资本市场的特点()

A、偿还期短、流动性强、风险小

B、偿还期短、流动性小、风险高

C、偿还期长、流动性小、风险高

D、偿还期长、流动性强、风险小

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