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问题 单项选择题

患者，男性，76岁，左下第一前磨牙叩痛。X线片示患牙根尖有暗影，根管细且影像模糊，根管预备过程中可选用的理想的化学预备药物为

A．次氯酸钠

B．过氧化氢溶液

C．EDTA

D．氯亚明

E．氯仿

答案

参考答案：C

单项选择题 A3/A4型题

女性，32岁。反复发热在37.5～38℃1个月，伴关节肌肉酸痛。查体：轻度贫血，心界不大，心率90／min，心尖有收缩期吹风样杂音三级，诊为风湿性心脏病，二尖瓣关闭不全，发热待查。

最有助于诊断感染性心内膜炎的检查是（）

A.胸部X线摄片

B.心电图

C.超声心动图

D.心血管造影

E.心脏CT
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单项选择题

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

（）is allocated dynamically, resources are optimized, and the entire infrastructure is simplified and flexible.

A．content

B．position

C．power

D．capacity
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