布氏杆菌病损伤的器官很广泛，其中以哪种器官为主()A．脾脏 B．肝脏 C．睾丸 D．

微生物在自然界中分布在 

①土壤中②水里③空气中④生物的体内（或体表）[ ]

A．①②

B．③④

C．②③④

D．①②③④

某施工单位承接了某丘陵区一级公路路基施工任务。施工单位编制了路基施工组织设计，并对施工组织设计进行了优化，重点优化了施工方案，主要包括施工方法的优化、施工作业组织形式的优化、施工劳动组织的优化。技术人员根据路基横断面计算出土石方的“断面方数”，经复核后，进行土石方纵向调配。调配时考虑到技术经济条件，尽量在经济合理的范围内移挖作填，使路堑和路堤中土石方数量达到平衡，减少了弃方与惜方。全标段路基挖方土质为普通土，平均运距50m的土方有150000m³，平均运距200m的土方有100000m³，平均运距3000m的土方有80000m³，K5+630～K5+810的平均挖方深度7m左右，施工单位采用的某一开挖断面示意如图1，要求上下错台同时掘进。

施工准备中，施工单位对逆作为路基填料的土样按《公路土工试验规程》的要求迸中心实验室世行标准试验，以计算最佳含水量和最大干密度，并通过其他相关试验确定了土的塑限、液限、塑性指靛、最大粒径、有害物质含量，最后将试验结果以书面形式报告监理工程师备案。

【问题】

1.补充施工方案的优化内容。

2.针对平均运距3000m的土方，写出宜配置的挖运施工机械。

3.计算全标段土方的平均运距。（计算结果取整数）

4.根据开挖断面示意图，写出K5+630～K5+810路段的路堑开挖方法的名称，并简要说明图中第二台阶掘进中暂不开挖土体A在施工中的主要作用。

5.取土试验还应确定土的哪些指标？资料中的“标准试验”具体是哪种试验？

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With over 500 instructors and 20 years of experience, we are the leader in the field of teaching foreign languages. We now have positions open in Osaka starting September/October 2004 for instructors of English, German, Spanish and French.

• Teach many different kinds of classes using the latest technology in small classes of up to 3 students.

•Accommodation （住宿）, and other necessary documents （文件） will be ready before you leave.

• Applicants will teach their first language only.

• Excellent teacher training programs.

If you are young with a university degree and are willing to experience different cultures, apply （申请） now. Experience in teaching is an advantage but not specially required. Knowledge of the Japanese language is not necessary but good English skills and practical computer knowledge are basic requirements.

Apply with C. V. and send letters to:

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34, Bd. Haussmann, 75009 Paris, France

Fax: 33148014804

Or visit our website: www.teadyp.com

The manager expects to meet and talk with successful applicants in Paris in June and July.

56. What is the purpose of the text?

A. To introduce a language school in Japan.

B. To hire language teachers to work in Japan.

C. To describe working conditions in Japan.

D. To make clear the requirements for Japanese teachers.

57. We know from the text that those who are going to Japan will _______.

A. teach English only in Osaka                 B. receive a degree from a university

C. have free accommodation                   D. get trained for the job

58. Before going to Japan, you need _______.

A. to see the manager of NOVA France    B. to take some computer courses

C. to write a letter to Japan                    D. to find a place to live

59. If you want to work in Japan you should _______.

A. have some working experience         B. know how to use computers

C. present good teaching plans           D. speak several languages

流程图中的执行框表明的是某一段程序或某一个模块的功能，它的特点是（）。

A.一个入口一个出口

B.一个入口多个出口

C.多个入口一个出口

D.多个入口多个出口

影响钻时的因素有哪些？