城市道路横断面规划设计的主要任务是在满足管线敷设以及（）等要求的前提下，经济合理地确

热力管道采用低支架敷设时，管道保温层外壳距地面的净高不宜低于( )m。

A．2.0

B．3.0

C．4.0

D．4.5

往复压缩机主要部件由曲轴箱、气缸、中体、曲轴、连杆、十字头、活塞、活塞杆、气阀、填料密封构成。

显示器分辨率指的是整屏可显示像素的多少，这与屏幕的尺寸和点距密切相关。例如15英寸的显示器，水平和垂直显示的实际尺寸大约为280min×210mm，当点距是0.28mm时，其分辨率大约是： ( )。

A．800×600
B．1024×768
C．1600×1200
D．1280×1024

Being the project manager in a software project which is currently initiated，you want to assess high level risks．What should you do ？（）

A．Develop a preliminary scope statement and document initially identified risks in this documen

B．Identify and analyze risk events using qualitative and quantitative technique

C．Develop contingency plans and fallback plans in case the original plan proves Wron

D．Discuss the risks documented in your risk register with the project key stakeholder