下列各项,不属胞宫功能的是()
A.主行月经
B.娩出胎儿
C.分泌带液
D.排泄恶露
E.种子育胎
参考答案:B
Packet-switching wireless networks are preferable (41) when transmissions are (42) because of the way charges are (43) per packet. Circuit-switched networks are preferable for transferring large files or for other lengthy transmissions because customers are (44) for the (45) of time they use the net-work.
A.point
B.start
C.length
D.end
决定供给弹性的首要因素是()。
A.资金有机构成
B.生产周期
C.时间
D.投入品替代性