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15×15=225

34×36=1224

25×25=625

33×37=1221

35×35=1225

32×38=1216

45×45=2025

31×39=1209

28×22=____

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同类题2

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    Some of the world's most famous musicians recently gathered in Paris and New Orleans to celebrate the first annual International Jazz Day. UNESCO( United Nations Educational, Scientific and Cultural Organization) recently set April 30 as a day to raise awareness of jazz music, its significance, and its potential as a unifying(联合) voice across cultures.

    Despite the celebrations, though, in the U.S. the jazz audience continues to shrink and grow older, and the music has failed to connect with younger generations.

    It's Jason Moran's job to help change that. As the Kennedy Center's artistic adviser for jazz, Moran hopes to widen the audience for jazz, make the music more accessible, and preserve its history and culture.

    "Jazz seems like it's not really a part of the American appetite," Moran tells National Public Radio's reporter Neal Conan. "What I'm hoping to accomplish is that my generation and younger start to reconsider and understand that jazz is not black and write anymore. It's actually color, and it's actually digital."

    Moran says one of the problems with jazz today is that the entertainment aspect of the music has been lost. "The music can't be presented today the way it was in 1908 or 1958. It has to continue to move, because the way the world works is not the same," says Moran.

    Last year, Moran worked on a project that arranged Fats Waller's music for a dance party, "just to kind of put it back in the mind that Waller is dance music as much as it is concert music," says Moran. "For me, it's the recontextualization. In music, where does the emotion(情感) lie? Are we, as humans, gaining any insight(感悟) on how talk about ourselves and how something as abstract as a Charlie Parker record gets us into a dialogue about our emotions and our thoughts? Sometimes we lose sight that the music has a wider context," says Moran, "so I want to continue those dialogues. Those are the things I want to foster."

同类题4

某些媒体报道“转基因植物油对人类的健康不利”,也有专家说“转基因植物油是安全的”,到底是否安全呢?某班初二学生针对这一问题进行了如下探究实验.

(一)实验器材:普通植物油,转基因植物油,稻谷若干,小白鼠若干,两个规格一样且空间足够大的铁笼等.

(二)该同学提出的问题:转基因植物油对人类的健康是否有影响.

(三)实验过程:

(1)将两个铁笼分别贴上甲组和乙组标签,选取两只身体健康状况良好、大小一致、性别相同的小白鼠,分别置于甲、乙铁笼中.

(2)称取一定重量的同种稻谷平均分成两份,分别拌适量且等量的普通植物油(A料)和转基因植物油(B料)待用.

(3)甲组饲喂适量A料,乙组饲喂____ B料.

(4)饲喂一段时间后,观察并记录甲、乙两组小白鼠的生长状况.

(5)预测实验结果和结论:

①若两组小白鼠的生长状况有明显差异,则说明转基因植物油对人类健康____ (填有或无)影响.

②若两组小白鼠的生长状况无明显差异,则说明转基因植物油对人类健康____ (填有或无)影响.

(四)请根据上述实验设计回答下列问题:

(1)请你为该同学做出假设,你的假设是:____ 

(2)该同学设置甲组的目的是对照,该实验的实验变量是____ 

(3)该实验选取小白鼠的数目过少,会增大实验的____ ,导致实验结论可信度不高.