失眠症最常见的病因是 A．心理生理因素 B．精神病的伴发症状 C．药物依赖的伴发症状

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.

39（）

A.rounds 

B.loops 

C.iterations 

D.circularities

Shy-Drager综合征，除自主神经功能损害外，还可有()

A．小脑性共济失调

B．帕金森综合征

C．锥体束征

D．肌肉萎缩

E．眼球震颤

某厂利用一种天然产物进行发酵，发现发酵液中含有U、V、W、X等多种化合物。已知：①U和W均可与银氨溶液反应，析出金属银，而且U是一种单糖；②V是个单官能团化合物，其碳原子数和X相同，V在浓硫酸作用下经加热得到Y，Y可以使溴水褪色；③V经缓和氧化可以生成W；④V和X在少量浓H₂SO₄作用下经加热可以得到Z；⑤X的组成为：C：40%、H：6.7%、O：53.3%，X含有一个羧基，并知450 mg X与25 mL 0.20 mol/L与NaOH溶液完全反应，X也可和乙醇起酯化反应。根据上述条件：

(1)写出符合U的一种可能的单糖结构简式：_______________。

(2)X的分子式是_______________，其所有可能的结构简式是____________________。

(3)V、W、Y、Z的可能结构简式分别是：V______________；W______________；Y______________；Z______________。

高压用电设备不能用（）作为保护措施。

A、容电器

B、自动开关

C、断电

D、接零

有关肾脏和肾上腺CT扫描技术的叙述，正确的是（）

A.CT不能确定和区分肾脏的良、恶性肿瘤

B.需观察泌尿系有无结石，宜先做碘过敏试验

C.延迟扫描能观察肾盂及肾盏内的占位

D.肾上腺体积较小，常规采用高分辨率模式

E.鉴别输尿管结石应加做70秒后延迟扫描