夏季施工暴风雨等恶劣天气的不确定性和突发性，需要及时收集（），及时采取有效的安全措施加强防范。
A.气象信息
B.调度信息
C.相关措施
参考答案：A
读“公转轨道相邻的三大行星相对位置示意图”，回答下列问题。
（1）分别在①、②两大行星公转轨道上标出其公转方向。
（2）与图示中行星距离最近且结构特征不同的行星是________________，它与图示中三大行星相比具有
____________________的特点。
Which of the following is a common characteristic of most project life cycle descriptions ？（）
A．Cost and staffing are low at start，higher towards the end of implementatioand drop rapidly as the project nears completio
B．The probability of successfully completing the project is highest at the start of the projec
C．Stakeholders have the most influence on the final characteristics of the product at the end of the projec
D．Risk and uncertainty are lowest at the start of the projec
