OkHttpClient是一个http请求的客户端，实现了 接口，提供newCall（）方法用于创建一个请求调用Call。

A new era is upon us. Call it what you will: the service economy, the information age, the knowledge society. It is all translated to a fundamental change in the way we work. Already we've partly been there. The percentage of people who earn their living by making things has fallen dramatically in the Western World. Today the majority of jobs in America, Europe and Japan (two thirds or more in many or these countries) are in the service industry, and the number is on the rise. More women are in the work force than ever before. There are more part-time jobs. More people are self-employed. But the breadth of the economic transformation can't be measured by numbers alone, because it is also giving rise to a radical new way of thinking about the nature of work itself. Long-held notions about jobs and careers, the skills needed to succeed, even the relation between individuals and employers—all these are being changed.

We have only to look behind us to get some sense of what may lie ahead. No one looking ahead 20 years possibly could have foreseen the ways in which a single invention, the chip (集成电路), would transform. our world thanks to its applications in personal computers, digital communications and factory robots. Tomorrow's achievements in biotechnology, artificial intelligence or even some still unimagined technology could produce a similar wave of dramatic changes. But one thing is certain: information and knowledge will become even more vital, and the people who possess it, whether .they work in manufacturing or services, will have the advantage and produce the wealth. Computer knowledge will become as basic a requirement as the ability to read and write The ability to solve problems by applying information instead of performing routine tasks will be above all else. If you cast your mind ahead 10 years, information services will be predominant It will be the way you do your job.

A characteristic of the information age is that ______.

A．the service industry is relying more and more on the female work force

B．manufacturing industries are steadily increasing

C．people find it harder to earn a living by working in factories

D．most of the job opportunities can now be found in service industry

A．Request

B．Builder

C．Response

D．Call

A、Spinner 也表现为一种列表，不过它的主要作用是让用户进行选择，比如一个下拉列表

B、Spinner 中显示的信息通常不是单一结构的， 常用ArrayAdapter来填充Spinner.

C、在XML文件中先定义好要加载的数据资源，然后使用ArrayAdapter. createFromResource0方法把该资源加载给Spinner.

D、直接在Java代码中使用ArrayAdapter对象，把List<t>中的数据资源加载到Spinner中。

A、setTimeout()

B、setReadTimeout()

C、setConnectTimeout()

D、setRequestMethod()

A、file:///asset/html/hello.html

B、file:///android_asset/html/hello.html

C、file:///androidasset/hello.html

D、file:///assets/html/hello.html