国际工程中的业务费包括（）。A．工程保险费 B．广告宣传费 C．办公费 D．法律顾问

美国参加第二次世界大战的直接原因是

A．德国偷袭波兰

B．德国进攻苏联

C．日本偷袭珍珠港

D．斯大林格勒战役爆发

税务机关作出具体行政行为时，未告知当事人诉权和起诉期限，致使当事人逾期向人民法院起诉的，其起诉期限从当事人实际知道诉权或者起诉期限时计算。但最长不得超过（）。

A．1年

B．2年

C．3年

D．5年

2010年1月15日，胡 * * * * 在上海世博园区考察时强调要积极贯彻科技世博和低碳世博理念，加强科技创新成果在园区的示范应用，实现园区低碳排放和生态和谐。

（1）请运用经济常识的有关知识，简要概括贯彻科技理念和低碳理念对我国经济发展有什么积极意义？

（2）请举一个能说明上海世博园区（或我们日常生活中）贯彻科技理念和低碳理念的事例，并简要解释其示范作用。

Losing a job or not being able to find one almost always brings unwelcome changes. If you’ve lost a job, the first feeling is often one of shock. On top of the loss of income, many people find the whole routine of their life is shattered, their contact with other people reduced, their ambitions halted and their identity as a worker removed.
There may be good feelings too—it’s nice to be able to lie in bed in the morning, to spend more time with children, or to have more time to think—a better job may be just around the corner. But, unless a better job does turn up, chances are the days start getting longer and the time becomes harder to fill. Many people pass through periods of difficulty in sleeping and eating. They feel irritable and depressed, often isolated and lonely.
Despite all these problems, unemployment can be a chance for a fresh start. You can discover that it provides an opportunity to sort out or rethink what you want from life and how best you can get it. You can use the time to plan how to find a new job, learn a new skill, develop your hobbies, see if you can run your own business, do some voluntary work in your community or meet new people. It’s up to you.

Unemployment provides a chance for you to rethink ______.

A．what you find and how to keep it

B．what you want and how to get it

C．how best you can do the new job

D．how best you can sort out a new job

局域网中使用的传输介质有双绞线、同轴电缆和光纤等。10Base-T采用3类UTP，规定从收发器到有源集线器的距离不超过 (1) m。100Base-T把数据传输速率提高了10倍，同时网络的覆盖范围 (2) 。假设tphy表示工作站的物理层时延，C表示光速，s表示网段长度，t表示中断器的时延，在10Base-5最大配置的情况下，冲突时槽约等于 (3) 。光纤分为单模光纤和多模光纤，与多模光纤相比，单模光纤的主要特点是 (4) ，为了充分利用其容量，可使用 (5) 技术同时传输多路信号。

A．100

B．185

C．300

D．1000