控制系统风险需要遵循下列原则:()A.闭环控制原则 B.动态控制原则 C.分级控制原

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问题:

控制系统风险需要遵循下列原则:()

A.闭环控制原则

B.动态控制原则

C.分级控制原则

D.多层次控制原则

考点:安全生产管理知识安全生产管理知识题库
题型:多项选择题

Visitors to this country are normally admitted for six months, but foreign students can usually stay for one year. They must (51) an educational institution, and they are required to study for a minimum of fifteen hours a week on a (52) course. Prospective students have to show that they can afford their studies, and that they have sufficient (53) resources to support themselves (54) in this country.

In order to work here the foreigner needs a work permit, (55) must be applied for by his prospective employer. The problem here is that the Department of Employment has the right to grant or (56) these permits, and there is little that can be done (57) it; it would be extremely unwise for a foreign visitor to work (58) a permit, since anyone doing so is liable to immediate deportation (驱逐出境). There are some people from the Common Market countries, who are often given (59) residence permits of up to five years. Some other people, such as doctors, foreign journalists, authors and others can work without permits, and foreign students are normally allowed to (60) part-time jobs while they are studying here.

55().

A.when 

B.what 

C.where 

D.which

题型:多项选择题

J.Martin指出,企业模型有许多特性。下列( )属于企业模型特性。
Ⅰ.完整性 Ⅱ.适用性 Ⅲ.持久性 Ⅳ.安全性

A.Ⅰ和Ⅱ

B.Ⅱ和Ⅳ

C.Ⅰ、Ⅲ和Ⅳ

D.Ⅰ、Ⅱ和Ⅲ

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潜油电泵运行()可以反映潜油电泵运行是否正常,甚至发生非常微小的故障和异常情况都可以记录、显示出来。

A、电流卡片

B、电压卡片

C、报表

D、记录

题型:多项选择题

对检波器的横向固有()要求是高一些好。

A、周期

B、质量

C、频率

D、重量

题型:多项选择题

以下哪些车辆属高速公路运营管理和执行紧急救护、救火、防汛等抢险任务的车辆()

A、各路段内部管理、养护等车辆

B、路政临时通知协助高速公路救护的车辆

C、本辖区内公安接高速公路案件出警和处臵抢险、救灾等重大突发事件的政府车辆

D、执行高速公路交通事故处理和巡逻任务的高速公路交警车辆

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