问题 单项选择题

The Rational Unified Process (RUP) is a software engineering process, which captures many of best practices in modem software development. The notions of (36) 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 (37) which is concluded with a well-defined (38) and can be further broken down into (39) -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 (40) logically by nature.

A.milestone

B.end-mark

C.measure

D.criteria

答案

参考答案:A

多项选择题
填空题

(13分)(1)“天宫一号”于2011年9月在酒泉卫星发射中心发射,标志着我国的航空航天技术迈进了一大步。火箭的第一、二级发动机中,所用的燃料为偏二甲胼和四氧化二氮,偏二甲肼可用胼来制备。

①用肼(N2H4)为燃料,四氧化二氮做氧化剂,两者反应生成氮气和气态水。

已知:N2(g)+2O2(g)=N2O4(g) △H="10.7kJ·" mol-1[

N2H4(g)+02(g)=N2(g)+2H20(g) △H="-543" kJ· mol-1

写出气态肼和N2O4反应的热化学方程式为                            .

②已知四氧化二氮在大气中或在较高温度下很难稳定存在,它很容易转化为二氧化氮。试推断由二氧化氮制取四氧化二氮的反应条件(或措施):                     

(2)科学家制造出一种使用固体电解质的燃料电池,其效率更高,可用于航天航空。如图l所示装置中,以稀土金属材料做惰性电极,在两极上分别通入CH4和空气,其中固体电解质是掺杂了Y203的Zr02固体,它在高温下能传导阳极生成的02-离子(02+4e →202-)。

①c电极的名称为            ,d电极上的电极反应式为                   

②如图2所示电解l00mL0.5 mol·L-1CuS04溶液,a电极上的电极反应式为       

                                。若a电极产生56mL(标准状况)气体,则所得溶液的pH=        (不考虑溶液体积变化),若要使电解质溶液恢复到电解前的状态,可加入                (填序号)。

a. CuO    b. Cu(OH)2    c.CuC03  d.Cu2(OH)2C03