根据《蒸汽锅炉安全技术监察规程》的规定:对于有过热器、省煤器、再热器的锅炉,必须保证

题型:单项选择题

问题:

根据《蒸汽锅炉安全技术监察规程》的规定:对于有过热器、省煤器、再热器的锅炉,必须保证哪个部位的安全阀最先开启()

A、锅筒

B、再热器

C、过热器

D、省煤器

考点:安全附件维修作业安全阀校验安全附件维修作业安全阀校验题库
题型:单项选择题

在生态系统伴随着物质循环进行的是(  )

A.氮循环

B.水循环

C.能量循环

D.能量流动

题型:单项选择题

判断数控机床的可靠度主要根据( )。

A.机床精度

B.机床机械效率

C.机床实际无故障工作概率

D.机床生产率

题型:单项选择题

Japanese couples,too busy for a normal social life,are increasingly turning to actors to play their friends on the most important days of their lives.

Several agencies have sprung up (涌现) offering actors to attend weddings or even funerals.The first guest-for-hire company was established about nine years ago and around 10 now send out dozens of pretend friends to family events.

Agencies such as Hagemashi Tai —— which means “I want to cheer you up” —— charge around £100 for each “guest”.Other services such as giving a speech in praise of a bride or the groom cost extra.

The appearance of the small fake friends industry has been linked to social and economic changes in Japan.With lifetime employment (终身雇佣制) a thing of the past,couples feel uncomfortable about inviting work colleagues to their wedding.Increasingly busy and stressed out,many Japanese surround themselves with only a very small circle of friends.

When they marry,however,they are under pressure to match the number of their new partner’s wedding guests.Office Agents,the largest provider of pretend friends,makes sure that its employees have done their homework and know all about the bride or groom before the wedding.

Hiroshi Mizutani,the company’s founder,said the fake friends he provides must look happy,be well dressed and look like people with good jobs.

小题1:Why did fake friends industry come into being in Japan?

A.Because of social and economic changes.

B.Because of lifetime employment.

C.Because of normal social life.

D.Because of work pressure..小题2:Pretend friends will be present on the following occasions except __________ .

A.weddings

B.funerals

C.work

D.family gathering小题3:The agents make sure that fake friends __________ .

A.have done their housework

B.have good jobs

C.must look happy and be well dressed

D.feel uncomfortable小题4:What is the main idea of this passage?

A.Japanese couples are under pressure to get married.

B.The first guest-for-hire company in Japan started.

C.Japanese couples’ social life is boring.

D.Japanese couples rely on fake friends.

题型:单项选择题

柏油样大便见于

A.十二指肠溃疡出血
B.溃疡性结肠炎
C.痢疾
D.结肠癌
E.胃穿孔

题型:单项选择题

要搞好系统的运行工作,首先要建立完备的()制度。

更多题库