(12分). 2012年10月4日，云南省彝良县发生特大泥石流，一汽车停在小山坡底，突然司机发现在距坡底240m的山坡处泥石流以8m/s的初速度、0. 4m/s2的加速度匀加速倾泻而下，假设泥石流到达坡底后速率不变，在水平地面上做匀速直线运动。已知司机的反应时间为1s，汽车启动后以0. 5m/s2的加速度一直做匀加速直线运动。试分析汽车能否安全脱离?

The cost baseline has all of the following characteristics EXCEPT:

A) It is a time-phased budget that will be used to measure and monitor cost performance on the project.
B) It shows the actual cost expenditures throughout the life of the project.
C) It is developed by summing estimated costs by period.
D) It is usually displayed in the form of an S-curve.