下列软件属于第三方系统优化软件的是（） A.GHOST B.超级兔子 C.分区魔术师

The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modem software development. The notions of use-cases and ______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 ______ which is concluded with a well-defined ______ and can be further broken down into ______ 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 ______ logically by nature.

A. activities B. workflows C. transitions D. functions

急性心脏压塞的主要特征（）

A.听诊心音减弱

B.Beck三联征

C.颈静脉怒张

D.触诊脉搏减弱

E.收缩期血压下降，舒张压不变

随着航空技术的发展，飞机的性能越来越好，起飞的跑道要求也是越来越短，有

的还可以垂直起降。为了研究在失重情况下的实验，飞行员将飞机开到高空后，让其自由

下落，模拟一种无“重力”（完全失重状态）的环境，以供研究人员进行科学实验。每次升

降过程可以获得持续30秒之久的“零重力”状态，以便研究人员进行不受重力影响的实验，

而研究人员站在飞机的水平底板上所能承受的最大支持力为重力的2.5倍的超重状态。为

安全起见，实验时飞机不得低于800米。求飞机的飞行高度至少为多少米？

水泵启动前，应检查轴承的油质、油量是否符合要求，（）是否畅通。

脑卒中急性期的体位摆放中，护理最容易的是采取（）

A.仰卧位

B.半卧位

C.俯卧位

D.健侧侧卧位

E.患侧侧卧位