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问题 单项选择题

用弧形视野计白色视标检查时，正常周边视野范围正确的是( )

A．颞侧90°
B．鼻侧70°
C．上方65°
D．下方60°
E．以上均正确

答案

参考答案：A

解析：用弧形视野计白色视标检查时，正常周边视野范围是颞侧90°，鼻侧60°，上方 55°，下方70°。

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）处填（）。

A．solutions

B．networks

C．interfaces

D．connections
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多项选择题

流感病毒的传播途径有（）

A.经用具、玩具传播

B.消化道传播

C.血液传播

D.飞沫传播

E.垂直传播
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