A customer is ordering a new p650 server to be placed into an existing OEM 42U 19-inch rack containing only two p630 servers. This is the first p650 in the enterprise. What is the most important question that the pSeries technical specialist should ask the customer before the order is placed？（）
A. Have the PDU requirements been met？
B. Are there sufficient KVM connections？
C. Is there sufficient service clearance？
D. Is there sufficient space in the existing rack？
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患儿，男性，10岁，水肿、尿少、肉眼血尿3天，3周前开始反复出现双下肢出血性皮疹，对称性分布，伴关节肿痛。最可能的是（）
A. 狼疮性肾炎
B. 急性。肾小球肾炎
C. 过敏性紫癜肾炎
D. 乙肝病毒相关性肾炎
E. IgA肾病
支气管肺炎典型的X线表现是（）
A. 大片状阴影
B. 上肺野小片状阴影
C. 双肺散在的小片状阴影
D. 双肺内中带沿肺纹理分布的多发小片状阴影
E. 多发小片状阴影融合为大片状阴影
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