第一宇宙速度的周期是()
A、24小时
B、36小时
C、12小时
D、1小时24分
参考答案:D
Andrew is __________ his father in many ways, especially they are both outgoing.[ ]
A. similar to
B. the same like
C. similar with
D. different from
当风压大于150KP时,SAB型防滑器压力开关接通。