锅炉属于承压类特种设备,其常用的安全附件有安全阀、压力表、水位计、温度测量装置、保护

题型:单项选择题

问题:

锅炉属于承压类特种设备,其常用的安全附件有安全阀、压力表、水位计、温度测量装置、保护装置、防爆门和锅炉自动控制装置等。下列装置或设施中,属于锅炉安全附件的是( )。

A.引风机
B.排污阀或放水装置
C.单向截止阀
D.省煤器

考点:安全工程师安全生产技术安全生产技术
题型:单项选择题
SUNNY SCHOOL
We are a bilingual(双语) school for children of 6-15. We want a cook, a library assistant, a sports coach and a language teacher.
Job
Age
Language
Skill
Other terms
cook
25~40
Chinese
Can cook Chinese and Western(西方) food
healthy
library assistant
20~35
Chinese,
has the knowledge(知识) on all kinds of books
careful
sports coach
20~40
Chinese, English
major in(主修) P.E.
healthy,
teacher
30~45
Chinese,
major in English
--
小题1:Who can’t go to Sunny School?
A.A four-year-old child. B.An eleven-year-old boy.
C.A fifteen-year-old girl D.An eight-year-old kid.
小题2:Who is not wanted by Sunny School?
A.A PE teacher. B.An English teacher.
C.A library assistant D.A math teacher.
小题3:The cook must be _______.
A.tall B.careful C.healthy D.smart
小题4:The Sunny School wants a teacher ________.
A.aged between 25 and 40
B.who can cook Western food
C.who is careful and strong
D.who can speak English and Chinese
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为了研究声音是怎样传播的,小丽同学用如图所示的装置进行探索。把正在发声的闹钟放在玻璃罩内,闹钟和罩的底座之间垫上软的泡沫塑料。逐渐抽出罩内的空气,她听到的闹钟声音逐渐变小,进一步推理可以得出:声音不能在               中传播。

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男性的性染色体组成是(  )

A.Y

B.XY

C.XX

D.YY

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“原则”就是规矩,就是准绳。而在日常生活和工作中,常见的表达方式是:“原则上……但是……”请以“原则”与“原则上”为议题写一篇论说文,题目自拟,700字左右。

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基本单位绞缆时,外层的基本单位比内层的基本单位按()绞合规律分布。

A.n+5

B.n+4

C.n+6

D.n+3

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