下列施工用电中属于三类负荷的是( )。 A.供水系统 B.供风系统 C.混凝土预

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问题:

下列施工用电中属于三类负荷的是( )。

A.供水系统
B.供风系统
C.混凝土预制构件厂
D.木材加工厂

考点:二级建造师水利水电工程水利水电工程管理与实务
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教材是教师进行教学的基本依据,也是学生直接的学习对象,是理解课程内容并达成课程目标的媒介。()

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如图所示,将正在发声的音叉紧靠悬挂在线上的小球,小球会多次被弹开,这个现象能表明:                        ,小球的作用是                                 

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生产调度工作主要的依据是( )。

A.生产计划

B.期量标准

C.生产库存

D.生产进度计划

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下表给出了一些金属材料的逸出功。现用波长为400 nm的单色光照射上述材料,能产生光电效应的材料最多(普朗克常量h=6.63×10-34 J·s,光速c=3.0×108 m/s)

[ ]

A.2种

B.3种

C.4种

D.5种

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Sociology is a social science that studies (1) societies, their interactions, and the processes that (2) and change them. It does this by (3) the dynamics of constituent parts of societies (4) as institutions, communities, populations, and gender, racial, (5) age groups. Sociology also studies social status (6) stratification, social movements, and social change, as (7) as societal disorder in the form of (8) , deviance, and revolution.
Social life overwhelmingly regulates (9) behaviour of humans, largely because humans lack (10) instincts that guide most animal behaviour. Humans (11) depend on social institutions and organizations to (12) their decisions and actions. Given the important (13) organizations play in influencing human action, it (14) sociology’s task to discover how organizations affect (15) behaviour of persons, how they are established, (16) organizations interact with one another, how they (17) , and, ultimately, how they disappear. Among the (18) basic organizational structures are economic, religious, educational, (19) political institutions, as well as more specialized (20) such as the family, the community, the military, peer groups, clubs, and volunteer associations.

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