作业人员在进行上下立体交叉作业时，不得在上下同一垂直面作业。（）
参考答案：对
Insurance is very important to logistics because of the potential hazards and dangers in the process,such as（）.
A.fireandtheft
B.unqualifiedproducts
C.techniqueproblem
D.andevennaturaldisasters
翻斗车通过泥泞地段或雨后湿地时应低速缓行。
