下列哪一个是二尖瓣狭窄最常见症状()
A.二尖瓣面容
B.气促、心悸
C.咯血
D.肝大
E.下肢水肿
参考答案:B
—I'm sorry I forgot to bring your MP4.
—_________ You can bring it here next time.
A. Sounds good B. Thank you C. It doesn't matter
对企业内和企业间的信息进行协调和集成是供应链有效管理的关键。