下列不是单级、串级三冲量给水调节系统相同点的是() A.给水流量信号反馈构成内回路

题型:单项选择题

问题:

下列不是单级、串级三冲量给水调节系统相同点的是()

A.给水流量信号反馈构成内回路

B.水位信号构成外回路

C.蒸汽流量信号的前馈信号

D.串级系统增加了一个调节器,主调节器控制外回路,副调控制内回路

考点:火力发电厂考试火电厂热工考试火电厂热工考试题库
题型:单项选择题

Windows操作系统中可以创建、修改和删除用户账户,可以安装程序并访问操作所有文件,也可以对系统配置进行更改的用户帐户是()。

A. 来宾账户

B.Guest账户

C.管理员账户

D.受限账户

题型:单项选择题

金融危机爆发以来,西方发达国家为挽救本国经济,出台了一系列带有贸易保护主义倾向的政策。如美国要求接受政府援助的企业,在公共工程施工中必须使用美国制造的产品;法国要求接受政府救助金的企业不得向国外转移生产;德、日等国对本国重点支柱产业和中小企业采取广泛的减税、现金补贴政策。对此,下列说法正确的有(   )

A.西方发达国家作为世界贸易组织的成员自觉履行世贸组织所规定的义务

B.这些国家出台的政策背离了世界贸易组织的宗旨的某些要求

C.这些国家出台的政策违背了非歧视原则、透明度原则和自由贸易原则

D.深化了国际分工和资源在世界范围内的合理配置

题型:单项选择题

发现万有引力定律的物理学家是[ ]

A.开普勒

B.伽利略   

C.牛顿

D.爱因斯坦

题型:单项选择题

Pet owners are being encouraged to take their animals to work,a move scientists say can be good for productivity,workplace morale(士气),and the well-being (安宁, 幸福)of animals.

A study found that 25% of Australian women would like to keep an office pet. Sue Chaseling of Pet care Information Service said the practice of keeping office pets was good both for the people and the pets.“On the pets’ side,they are not left on their own and won’t feel lonely and unhappy,”she said. A study of major US companies showed that 73% found office pets beneficial(有益的),while 27% experienced a drop in absenteeism(缺勤).

Xarni Riggs has two cats walking around her Global Hair Salon in Paddington.“My customers love them. They are their favorites,”she said.“They are not troublesome. They know when to go and have a sleep in the sun.”

Little black BJ has spent nearly all his two years “working” at Punch Gallery in Balmain. Owner Iain Powell said he had had cats at the gallery for 15 years.“BJ often lies in the shop window and people walking past tap on the glass,”he said.

Ms Chaseling said cats were popular in service industries because they enabled a point of conversation. But she said owners had to make sure both their co-workers and the cats were comfortable.

小题1:The percentage of American companies that are in favor of keeping office pets is ________.

A.73%

B.27%

C.25%

D.15%小题2:We know from the text that “BJ” ________.

A.works in the Global Hair Salon

B.often greets the passers-by

C.likes to sleep in the sun

D.is a two-year-old cat小题3:The best title for this text would be ________.

A.Pets Help Attract Customers

B.Your Favorite Office Pets

C.Pets Join the Workforce

D.Busy Life for Pets

题型:单项选择题

社会志愿服务的核心是()

A、助人和服务

B、志愿和自愿

C、义务和奉献

D、组织和协调

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