慢性支气管炎伴阻塞性肺气肿患者，出现突然加剧的呼吸困难，并伴有胸痛及发绀，听诊一侧肺为鼓音，最大可能是（）。
A. 慢性肺源性心脏病
B. 肺部急性感染
C. 自发性气胸
D. 肺栓塞
E. 胸腔积液
查看答案
具活血补血，舒筋活络功效的药是（）
A. 益母草
B. 当归
C. 红花
D. 鸡血藤
E. 首乌藤
A Network Engineer is reporting that one of the AIX hosts is generating too much ICMP traffic, which is slowing the network. Which of the following options is the most probable cause?（）
A large FTP job is in process.
B. A network interface was misconfigured.
C. The ping command is being used excessively.
D. A bad network interface card and/or network cable is in use.&e
微信支付 
支付宝支付