As a student, he knows that he must _______ himself to get good marks.[ ]

A. depend on

B. help out

C. give his life to

D. take care of

下列属于选择物流目标市场的基本条件的有（）。

A.有足够的吸引力

B.有发展潜力

C.有一定的物流规模

D.符合物流企业的实力