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生活在十九世纪的英国女小说家艾米莉·勃郎特和美国女诗人艾米莉·狄金森是英美文学史上曾引起世界轰动的"奇"作家.通过......
应用叶面分析仪、根系分析仪对北美车前(Plantago virginica)地上和地下部分形态进行了测定,考察北美车前种群密度对植株形态学参数......
为了使股票价格更加符合市场实际情况,采用了能够反映股票预期收益率波动变化的指数O-U(Ornstein-Uhlenback)过程来刻画股票价格的变......
Clinical Evaluation and Surgical Management of Some Important Reproductive Problems of Intensively R
Almost all healthy female chickens are expected to optimally produce eggs regularly. To maximize profits, nonproductive ......