甲、乙两个圆形花坛一共占地44.2平方米，已知甲、乙两个花坛的半径的比是5：3，

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．

71（）

A．advantages

B．resources

C．benefits

D．precedents

简述效力待定合同的具体种类。

下列脑膜瘤CT征象最少见的是（）。

A.平扫呈等或略高密度

B.增强呈均匀强化

C.肿瘤与硬脑膜基底粘连

D.瘤体形态不规则，边缘模糊

E.邻近颅骨增厚或破坏

用活性炭管采集空气中的苯，以0.2L/min的流速采集10分钟（在标准状况下）用1ml二硫化碳解吸后，测得苯含量为20μg/ml，则空气中苯的浓度是（）。

A.15mg/m³

B.5mg/m³

C.10mg/m³

D.8mg/m³

E.20mg/m³

生前入水溺死者，尸体出水面后，体内溺液外渗体外，但进入内脏的（）残留体内而不会外渗。