反硝化作用是硝酸盐在()情况下经微生物作用而还原的过程。

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问题:

反硝化作用是硝酸盐在()情况下经微生物作用而还原的过程。

考点:生物学环境工程微生物环境工程微生物题库
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点P(3,4)在(       )            

A 第一象限      B 第二象限        C 第三象限       D 第四象限

题型:填空题

系统性红斑狼疮最常受累的脏器是()

A.肺脏

B.肾脏

C.心脏

D.胃肠道

E.神经系统

题型:填空题

休克病人最宜采取的体位是( )

A.平卧位

B.下肢抬高10°

C.头和躯干抬高10°

D.头、躯干抬高20°~30°,下肢抬高:15°~20°

E.头、躯干抬高40°~50°,下肢抬高30°~40°

题型:填空题

封闭式基金的固定存续期通常()。

A.无固定期限

B.在5年以上

C.在15年以上

D.在半年以上

题型:填空题

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (36) of the technical requirements for the software product.

During the requirements definition phase, the requirements definition team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specification of each function that the software must perform and each (37) that it must meet. The starting point is usually a set of high-level requirements from the (38) that describe the project or problem.

In either case, the requirements definition team formulates an overall concept for the system and then defines (39) showing how the system will be operated, publishes the system and operations concept document, and conducts a system concept review (SCR).

Following the SCR, the team derives (40) requirements for the system from the high level requirements and the system and operations concept. Using structured or object-oriented analysis the team specifies the software functions and algorithms needed to satisfy each detailed requirement.

(38)是()

A.producer

B.customer

C.specification

D.analyser

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