5[单选题] 关于 Handler 的说话正确的是(） A.它实现不同线程间通信的一种机制 B.它避免了新线程操作 UI 组件 C.它采用栈的方式来组织任务的

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河南成教 / Android应用开发

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5[单选题]
关于 Handler 的说话正确的是(）

A.它实现不同线程间通信的一种机制

B.它避免了新线程操作 UI 组件

C.它采用栈的方式来组织任务的

D.它可以属于一个新的线程

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题型描述: 阅读理解Laptop computers are popular all over the world. People use them on trains and airplanes, in airports and hotels. These laptops connect people to their workplace. In the United States today, laptops also connect students to their class-rooms. Westlake College in Virginia will start a laptop computer program that allows students to do schoolwork anywhere they want. Within five years, each of the 1,500students at the college will receive a laptop. The laptops are part of a $10million computer program at Westlake, a 110-year-old college. The students with laptops will also have access to the Internet. In addition, they will be able to use e-mail to “speak” with their teachers, their classmates, and their families. However, the most important part of the laptop program is that students will be able to use computers without going to computer labs. They can work with it at home in a fast-food restaurant or under the trees—practically anywhere!Because of the many changes in computer technology, laptop use in higher education such as colleges and universities, is workable. As laptops become more powerful, they become more similar to desktop computers. In addition, the portable computers can connect students to not only the Internet, but also libraries and other resources. State higher-education officials are studying how laptops can help students. State officials also are testing laptop programs at other universities, too. At Westlake College, more than 60 percent of the staff use computers. The lap-tops will allow all users to use computers in their lessons. As one Westlake teacher said, “Here we are in the middle of Virginia and weˊre giving students a window on the world. They can see everything and do everything.”1、 The main purpose of the laptop program is to give each student a laptop to _ _ _ _ . A. use for their schoolwork B. access the Internet C. connect them to libraries D. work at home 2、 Why is the word “speak” in the second paragraph in quotation marks？ A. None of the above reasons is correct. B. They donˊt really talk. C. They use the computer language. D. Laptops have speakers. 3、 Which of the following is true about Westlake College？ A. Students there can do anything. B. All teachers use computers. C. It is an old college in America. D. 1,500students have laptops. 4、 A window on the world in the last paragraph means that students can _ _ _ _ . A. get information from around the world B. attend lectures on information technology C. have free laptops D. travel around the world 5、 What can we infer from the passage？ A. am is too expensive. B. We donˊt know the result yet. C. The program is successful. D. The program is not workable.统考英语B

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[单选题] 根据我国国家标准GB17859-1999，第3级称为 A.系统审计保护级 B.安全标记保护级 C.结构化保护级 D.访问验证保护级信息安全技术