( )是我国旅游业的徽志。
A.天坛祈年殿
B.大熊猫
C.万里长城
D.马超龙雀
参考答案:D
汽轮机的暖机及升速时间是由哪些因素来决定的?
The schedule control process for a project ______ .
A.focuses on starting the project earlier than scheduled
B.is necessary for controlling changes to the project schedule
C.is concerned only with activities that are on the critical path
D.should focus entirely on activities that are difficult to carry out