使用CommonDialog控件的( )方法,可显示“打印”对话框oA.ShowO

题型:单项选择题

问题:

使用CommonDialog控件的( )方法,可显示“打印”对话框o

A.ShowOpen

B.ShowSave

C.ShowColor

D.ShowPrinter

考点:计算机等级考试VISUALBASIC二级VISUALBASIC笔试
题型:单项选择题

关于上下行的丢包率,下面说法正确的是()。

A.丢包率的只是一个参考值,其大小不影响用户的上下行流量

B.丢包越少越好,一个独立的丢包率测量结果的准确性取决于在测量的时间内有多少个包已被接收

C.丢包率测量的目的是为测量拥塞和流量管制等原因导致的丢包情况

D.由于UU口以及层2的各个子层均可能出现丢包,因此需要计算平均值来表征丢包率

题型:单项选择题

器官移植后发生慢性移植排斥反应的患者体内明显升高的是()

A.IL-1

B.IL-2

C.IL-6

D.GM-CSF

E.IFN-γ

题型:单项选择题

The library is one of the most popular places at a western university. Students turn to it for research, conversations about class, and many other services.

Compared with Chinese libraries, college libraries, college libraries in the US and UK tent to offer more resources. A postgraduate at Yale University can borrow as many as 225 books at a time.

In addition to borrowing books, there are online and electronic resources. These include a database search of popular and academic material, such as LexisNexis Academic, which offer items from newspapers and magazines.

Although books and articles are the items that students ask for most frequently, some libraries provide audio and video recordings, maps and sheet music (活页乐谱). At some schools, teachers and tutors put electronic copies of their teaching PPTs on the library Web to give easier access for students.

Another useful service in Western college libraries is the Interlibrary Loan. This allows a student at one school to borrow books from another school. The loan request is make through the student’s college library, which gets the book, gives it to the user, and arranges for its return.

Technology has brought more services to students and has made libraries attractive. Some universities have services for students to send messages through the computer or mobile texts to ask the library staff for information.

Earlier this year, Harvard University introduced a new Scan and Deliver service, allowing students to make requests for parts of books and articles. Requests made through the system are handled by library staff. The student receives and e-mail with an Internet link to the scanned pages. The service is free and all material comes within four days.

It used to be that libraries didn’t allow food or drinks. But that rule is changing and many of them now contain a café so students can spend as much time as they want in the library.

Actually, some US university libraries are now all-night affairs, or have at least one study room open all night.

1. In Western college libraries a postgraduate can ______.

A. have a free drink or a meal

B. borrow as many books as they want

C. access not only books but other study resources

D. ask questions and get answers from their tutors

2. LexisNexis Academic is the name of ______.

A. a database

B. a library

C. a university

D. a guide

3. How can a college student borrow books from other college’s libraries?

A. By going to these libraries.

B. By getting them through the Internet.

C. By sending messages through the computer or mobile texts.

D. By borrowing them through their own library.

4. Which of the following statements is TRUE?

A. Chinese library services are better than western ones.

B. Library staff play an important role in college library service.

C. Postgraduates can post their own PPTs to the library website.

D. 24-hour services are adopted in all western libraries nowadays.

5. Why are university libraries more attractive now?

A. Because students can eat and drink there at any time.

B. Because students can have a stay-over there all night.

C. Because students can enjoy quicker and more convenient services.

D. Because students can borrow anything they want there.

题型:单项选择题

火灾自动报警系统中的火灾探测器进行模拟火灾响应和故障信号检验时的数量要求是()。

A.实际安装数量在100只以下者,抽验20只 

B.实际安装数量在100只以下者,抽验10只 

C.实际安装数量超过100只者,每个回路按实际安装数量10%~20%的比例抽验,但抽验总数不应少于20只 

D.实际安装数量超过100只者,每个回路按实际安装数量10%~20%的比例抽验,但抽验总数不应少于10只 

E.被检查的火灾探测器的类别、型号、适用场所、安装高度、保护半径、保护面积和探测器的间距等均应符合设计要求

题型:单项选择题

人工牙根据制作材料分为()

A.前牙和后牙

B.解剖式牙和半解剖式牙

C.解剖式牙和非解剖式牙

D.塑料牙和瓷牙

E.树脂牙和金属牙

更多题库