国家规定，凡是没有经过可行性研究的开发建设项目，不能批准设计任务书，不能进行设计，不能列入计划。 ( )

When carrying out a parallel track search pattern，the course of the search units should normally be which of the following（）.

A.In the same direction as the anticipated drift

B.In the opposite direction of the anticipated drift

C.Perpendicular to the line of anticipated drift

D.Downwind