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问题 单项选择题

男性，58岁，晨起左侧偏瘫，意识清，下午检查发现左侧面瘫，左侧上下肢肌力Ⅳ级，第二日早晨，完全恢复正常，无后遗症，可考虑诊断为

A．脑血栓形成

B．脑栓塞

C．颈内动脉系统短暂性脑缺血发作

D．椎基底动脉系统短暂脑缺血发作

E．脑出血

答案

参考答案：C

选择题

照相机的镜头相当于一个凸透镜，为了在底片上成缩小的实像，所照景物应放在镜头（　　）

A．一倍焦距以内

B．一倍焦距至二倍焦距之间

C．二倍焦距以外

D．任何位置
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单项选择题

Virtualization is an approach to IT that pools and shares (71) so that utilization is optimized and supplies automatically meet demand. Traditional IT environments are often silos, where both technology and human (72) are aligned around an application or business function. With a virtualized (73) , people, processes, and technology are focused on meeting service levels, (74) is allocated dynamically, resources are optimized, and the entire infrastructure is simplified and flexible. We offer a broad spectrum of virtualization (75) that allows customers to choose the most appropriate path and optimization focus for their IT infrastructure resources.

（75）是（）

A.solutions

B.networks

C.interfaces

D.connections
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