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问题 单项选择题

心力衰竭可伴有

A．胸骨左缘收缩期杂音
B．奔马律
C．肺动脉瓣区第2音亢进
D．心尖部收缩期杂音
E．心包磨擦音

答案

参考答案：B

解析：心室舒张期负荷过重，心肌张力减低、顺应性减退，致舒张时血液充盈引起室壁震动。

单项选择题

You are the project manager of a new project, which will construct a bridge on the River Nile in Egypt. Before initiating the project, you should （）.

A．create a scope management plan to document：how the project scope will be defined, verified and controlled

B．develop a project management plan

C．determine specific activities that need to be performed to produce the various project deliverables

D．facilitate the formal authorization to start a new project
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单项选择题

玻璃破碎探测器可分为以下三种类型：单技术型、（）和声控/次声波双技术型。

A.微波/次声波双技术型

B.振动/次声波双技术型

C.微波/振动双技术型

D.声控/振动双技术型
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