哪项是冠状循环的调节因素()
A.主动脉舒张压
B.主动脉平均压
C.主动脉收缩压
D.肺动脉楔压
E.中心静脉压
参考答案:A
Marketing is ________just distributing goods from the manufacturer to the final customer.
A.rather than
B.other than
C.bigger than
D.more than
电力设备、施工机械损坏,直接经济损失达()万元,构成重大设备事故。