物流学科研究的对象是()
A.物流要素
B.物流技术
C.物流系统
D.物流设备
参考答案:C
— Is there an egg on the table?
— ___________________.[ ]
A. Yes, it is
B. Yes, there is
C. No, there aren't
D.Yes, they are
该患儿最可能的诊断
A.肺炎合并脓气胸
B.肺炎合并气胸
C.肺炎合并心衰
D.肺炎合并肺大泡
E.肺炎合并纵隔气肿