什么叫虚拟设备?为什么要引进虚拟设备的概念?

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问题:

什么叫虚拟设备?为什么要引进虚拟设备的概念?

考点:计算机操作系统网络操作系统网络操作系统题库
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根据短文内容, 选择正确答案。

Notice about Traveling to Oregon State University

  In order to give students a better understanding of the American economy,

culture and education, our school will organize a 15-day visit to Oregon State

University in the USA where speeches on American agriculture, economy and

culture will be given. Students will also have the chance to visit some American

universities and companies, go to concerts, watch sports events and visit San

Francisco and Portland. Students will be staying with local Americans on

weekends to experience western culture and customs. The total price of the trip

will be $1500, including accommodation (住宿), transportation and travel

expenses (费用). There will be an introduction meeting on Feb, 26th in Room

104 of Teaching Building at 1:00 pm. For more information please call at

84399117 or send an e-mail to mpp@njau.edu.cn.

1. The trip to Oregon State University will last _____ days.

A. 15    

B. 26    

C. 31    

D. 10

2. The speech to be delivered will NOT be on American _____.

A. agriculture        

B. economy 

C. culture            

D. education

3. If twin brothers, Victor and Sam, want to take this trip, they will have to pay

_____.

A. $1500  

B. $2000    

C. $ 3000  

D. $ 4500

4. If students want more information, which of the following contact details

(联系的细节) is NOT provided?

A. A phone number.      

B. An e-mail address.

C. The teacher’s name.  

D. A room number.

5. The above information is probably a(n) _____.

A. news report        

B. price list

C. guidebook          

D. advertisement  

题型:问答题 简答题

(57600÷900+64×99)÷25.

题型:问答题 简答题

休克监测中最常用的项目是()

A.心脏指数

B.血气分析

C.肺动脉楔压

D.中心静脉压

E.心排出量

题型:问答题 简答题

新系统投入运行后,原系统仍有一段时间与之并行工作,称为( )。

A.并行转换

B.直接转换

C.跟踪检验

D.跟踪调试

题型:问答题 简答题

女患者,30岁,每于经期发热,伴小腹疼痛,经行不畅,色紫黯,有血块,舌边尖有瘀点,脉沉弦数。中医辨证为()

A.气血虚弱

B.血热内盛

C.肾虚肝郁

D.肝肾阴虚

E.瘀热壅阻

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