简述二元哈夫曼编码的编码步骤。

图为“某市居民恩格尔系数变化图”。该图表明：

①该市居民食品消费支出总额呈逐年下降趋势

②该市居民消费结构不断改善，生活水平提高

③该市经济持续增长，居民收入增加

④该市居民收入差距有所扩大

A．①②③

B．①③

C．②③

D．①④

Fifteen years ago, I entered the Boston Globe, which was a temple to me then . It wasn’t easy getting hired. I had to fight my way in to a dime-a-word job. But once you were there, I found , you were in .

Globe jobs were for life-guaranteed until retirement. For 15 years I had prospered there—moving from an ordinary reporter to foreign correspondent and finally to senior editor. I would have a lifetime of security if I struck with it.

Instead, I had made a decision to leave.

I entered my boss’s office. Would he rage? I wondered. He had a famous temper. “Matt, we have to have a talk, ” I began awkwardly. “I came to the Globe when I was twenty —four. Now I’m forty . There’s a lot I want to do in life. I’m resigning. ”

“To another paper? ” he asked.

I reached into my coat pocket, but didn’t say anything, not trusting myself just then.

I handed him a letter that explain everything. It said that I was leaving to start a new media company. That the Globe had taught me in a thousand ways. That we were at a rare turning point in history, I wanted to be directly engaged in the change.

“I am glad for you , ” he said , quite out of my expectation. “ I just came from a board of directors meeting and it was seventy-five percent discouraging news. Some of that we can do deal with. But much of it we can’t ,” he went on. “I wish you all the luck in the world, ”be concluded. “And if it doesn’t work out , remember ,your star is always high here.”

Then I went out of his office, walking through the newsroom for more good-byes. Everybody was saying congratulations. Everybody—even though I’d be risking all on an unfamiliar venture : all the financial security I had carefully built up.

Later, I had a final talk with Bill Taylor, chairman and publisher of the Boston Globe. He had turned the Globe into a billion-dollar property.

I’m resigning, Bill, ” I said. He listened while I gave him the story. He wasn’t looking angry of dismayed either. After a pause, he said, “Golly, I wish I were in your shoes.”

小题1: From the passage we know that the Globe is a famous         .

A．newspaper

B．magazine

C．temple

D．church小题2:If the writer stayed with the globe,         .

A．he would be able to realize his lifetime dreams

B．he would let his long favourite dreams fade away

C．he would never have to worry about his future life

D．he would never be allowed to develop his ambitions小题3:The writer wanted to resign because    .

A．he had serious trouble with his boss

B．he got underpaid at his job for the Globe

C．he wanted to work in the new media industry

D．he had found a better paid job in a publishing house小题4:By “I wish I were in your shoes. ”(in the last paragraph), Bill Taylor meant that    .

A．the writer was to fail

B．the writer was stupid

C．he would do the same if possible

D．he would reject the writer’s request

试题(1)、(2) 在Web服务技术体制中，____(1)____是实现服务组合的事实标准。服务组合过程中需要提供对Web服务多种高级特性的支持，通常采取制定规范，对SOAP消息进行扩展的方式实现。例如，规范____(2)____通过对SOAP消息的扩展，实现Web服务的安全性。

1（）

A．WS-CDL

B．WS-BPEL

C．WS-Choreography

D．WS-Orchestration

当用电设备容量很大，或负荷性质重要，或在有潮湿、腐蚀性环境的车间、建筑内，宜采用（）配电。

A.树干式

B.放射式

C.环网式

D.以上三种均可

总体规划是规划期内主要的国民经济和社会发展的( )规划。

A．战略性

B．纲领性

C．政策性

D．综合性

E．导向性