沉淀池的宽度一般为______m,最大不超过______m。 A.3~8;15 B

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问题:

沉淀池的宽度一般为______m,最大不超过______m。

A.3~8;15
B.3~5;15
C.3~8;12
D.3~5;12

考点:注册公用设备工程师给水排水专业给水排水专业知识(上午)
题型:单项选择题

2013年4月18日,中国人民银行实施正回购(央行向交易商卖出有价证券)市场操作,净回笼资金430亿元,这是央行今年第九次开展正回购市场操作。央行正回购的连续实施,其意在于( )

A.调节货币供应,释放通货膨胀压力

B.引导利率下行,激发企业投资需求

C.宽松货币供应,预防经济增速下滑

D.稳定利率水平,保障居民储蓄收益

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三面切纸刀的特点?

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采集环境空气和废气中有机磷农药样品前,用流量计校定每一个采样泵,采集样品时采样管应垂直放置,()端朝下,在离地面约()m处采样。

题型:单项选择题

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 interative 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.programmer

D.analyser

题型:单项选择题

视力主要反映以下哪一部位的视功能()

A.视网膜黄斑部

B.视神经

C.视网膜周边部

D.视盘

E.大脑视中枢

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