在路径约束动画当中，如果对该物体的运动曲线添加关键点之后，提高曲线的斜率，则该物（）
A.不变
B.变快
C.变慢
D.与曲线斜率无关
参考答案：B
消防站责任区范围宜为4～7kmz，在接警( )后，消防队可达到责任区的边缘。
A．2min
B．3min
C．4min
D．5min
Could you tell me ______ there?
A．when the first bus will arrive at
B．when would the first bus arrive
C．when the first bus arrived at
D．when the first bus arrives
