题目内容

简述主控系统与变流系统间的接线,并描述其功能.

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During the project, requirements change for a variety of reasons. As needs change and as work proceeds, additional requirements are derived and changes may have to be made to the existing requirements. It is essential to manage these additions and changes efficiently and effectively. To effectively analyze the impact of the changes, it is necessary that the source of each requirement is known and the rationale for any change is documented. The project manager may, however, want to track appropriate measures of requirements volatility to judge whether new or revised（）are necessary.

A. proceedings
B. controls
C. forecastings
D. Prelibations

隋代科举制

男，42岁。因持续发热半个月于9月入院，患者半个月前开始发热，最初几日体温38℃左右，后逐渐上升到39℃多，食欲明显减退，腹胀腹泻，2～4次／日，便稀，无脓血。入院后给予治疗，体温逐渐下降，症状随之好转。1周后突感腹痛，体温又上升，体检：T39．9℃，P124次／分，神清，心肺（-），腹胀有压痛，右下腹压痛最明显，肝脾未及，肝浊音界消失。血WBC18×10／L，中性粒细胞85%，淋巴细胞15%。ALT120U／L，HBsAg（+）。下列处理最合理的是（）

A. 抗感染保守治疗，必要时手术
B. 足量有效抗生素感染，不必要手术
C. 立即手术治疗
D. 手术治疗同时加用足量有效抗生素
E. 保肝降酶，抗感染治疗

气体使用者应当购买已取得气瓶充装许可的单位充装的（）。