题目

Holbrook girl marks 10th birthday with chemotherapy port shirt giveawayAll Sophia Espiritu wanted for her 10th birthday was to help children who, like her, are undergoing treatment at Stony Brook Cancer Center.Sophia, of Holbrook, has Langerhans Cell Histiocytosis(朗格汉斯细胞组织细胞增多症), a ______ form of cancer believed to ______ one in 200,000 children, according to the Histiocytosis Association. After receiving her ______ chemotherapy(化疗) treatment on Wednesday, Dec. 5, her birthday, Sophia, a ______ Four student at Tamarac Elementary School in Holtsville, ______ chemot3．科研人员在同一温带草原上选择放牧、割草、围封三种不同利用方式的样地，测定湿润年和干旱年的土壤呼吸总量（样地内植被和微生物的呼吸总量），结果如图所示．据图分析不正确的是（　　）A．实验目的之一是研究草原不同利用方式对土壤呼吸的影响B．土壤呼吸是草原群落中碳输出的重要途径C．水分对草原生态系统的碳循环具有明显影响D．割草样地的土壤呼吸对降水状况反应最不敏感