输尿管结石患者血尿特点？
A. 无痛性肉眼血尿
B. 疼痛伴血尿
C. 终末血尿
D. 进行性血尿
膀胱结石主要临床表现？
A. 尿频、尿急、尿痛
B. 无痛性肉眼血尿
C. 尿潴留
D. 尿失禁
NICs are considered Layer 2 devices becouse each individual NIC throughout the world carries a unique code, called.
A. binary impulses
B. serial format
C. code of network interface card
D. Media Access Control Address
One of the disadvantages of the type of cable that we primarily use, CAT 5 UTP, is.
A. the cost of this kind of medium
B. difficult to install
C. cable length
D. too complicated
微信支付 
支付宝支付