中枢性降压药是()
A.卡维地洛
B.硝普钠
C.普萘洛尔
D.胍乙啶
E.甲基多巴
参考答案:E
解析:
甲基多巴为第二代中枢性降压药,降压作用与可乐定相似,作用中等偏强。
多项式3xy﹣6x3y2﹣xy2+26是( )次( )项式,最高次项是( )。
The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modern software development. The notions of (21) and scenarios have been proven to be an excellent way to capture function requirements. RUP can be described in two dimensions - time and content. In the time dimension, the software lifecycle is broken into cycles. Each cycle is divided into four consecutive (22) which is concluded with a well-defined (23) and can be further broken down into (24) - a complete development loop resulting in a release of an executable product, a subset of the final product under development, which grows incrementally to become the final system. The content structure refers to the disciplines, which group (25) logically by nature.
25()
A.functions
B.workflows
C.actions
D.activities