()单位在项目开工前负责制定设计变更在设计、监理、施工单位流转的具体时限并督办。
参考答案:监理
有一物体做直线运动,其v-t图象如图所示,从图中看出,物体加速度和速度方向相同的时间间隔是
A.只有0<t<2s
B.只有2s<t<4s
C.0<t<2 s和6s<t<8s
D.0<t<2s和5s<t<6s
Which of the following is not an operation mode of AIS?()
A.A ship-to-ship mode
B.A ship-to-shore mode
C.Integrated with a vessel traffic system
D.Sending out information through broadcast automatically