关于利用太阳能的研究已经有几十年的历史了,可它至今没有走进寻常百姓家。要使太阳能真正

题型:单项选择题

问题:

关于利用太阳能的研究已经有几十年的历史了,可它至今没有走进寻常百姓家。要使太阳能真正达到实用水平,从技术上需要解决两个问题:一是要提高太阳能光电变换效率并降低其成本,二是要实现太阳能发电与现在的电网联网。从社会政策上也需要解决两个问题:一是要获得普通百姓对清洁能源的支持,二是要获得政府对太阳能发电的前期投入。
“太阳能至今没有走进寻常百姓家”有诸多原因,选出其主要原因的一项是( )。

A.在提高太阳能光电变换效率,并降低其成本方面尚不理想
B.太阳能发电与现在的电网尚未成功联网
C.普通百姓对清洁能源还没有达到认可的程度,政府的前期投入也还不够
D.目前尚未提供建造太阳能发电站的足够面积

考点:地方公务员行政职业能力测试吉林省公务员考试行政职业能力测试甲级真题2009年
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炎症灶中吸引炎细胞定向集中的现象称为()

A.白细胞游出

B.白细胞吞噬

C.白细胞阿米巴运动

D.阳性趋化性

E.白细胞渗出

题型:单项选择题

符合慢性增生性牙髓炎的表现有()

A.息肉充满整个龋洞

B.常伴有牙松动

C.X线片见髓室底完整

D.可无明显自觉症状

E.息肉与牙髓相连

题型:单项选择题

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (87) 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 (88) that it must meet. The starting point is usually a set of high-level requirements from the (89) that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for the system and the defines (90) showing how the system will be operated, publishes the system and operation concept documents, and conducts a system concept review (SCR).
Following the SCR, the team derives (91) requirements for the system from the highlevel requirements and the system operations concept. Using structured or object-oriented analysis,the team specifies the software functions and algorithms needed to satisfy each detailed requirements.

A. detailed B. outlined
C. totalD. complete

题型:单项选择题

装饰装修工程施工中,不得拆除的墙体有()。

A.围护墙

B.承重墙

C.隔墙

D.非承重墙

题型:单项选择题

人体静电的危害包括()方面。

A.人体电击及由此引起的二次事故

B.引发爆炸和火灾

C.对静电敏感的电子产品的工作造成障碍

D.引起电气装置能耗增大

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