Here __________ the teacher.[ ]
A. come
B. comes
C. has
答案：B
根据物流成本性态特征，物流成本划分为（）。
A.直接成本与间接成本
B.固定成本与变动成本
C.生产成本与销售成本
D.资金成本与经营成本
—Excuse me, when does Flight CZ3391 take off —One moment, please. I'll ______ it.
A. look up B. take away C. give back D. turn down
