问题 问答题 简答题

我国海水养殖业发展的主要特点。

答案

参考答案:

一,产业结构趋向合理捕捞业与养殖业的结构得到了明显的改善:1978年捕捞业与养殖业的产量比重为74:26到2000年的40:60。

养殖业内部的品种结构发生了很大的变化:在以往的养殖生产中,现在海水养殖的鱼、虾、蟹、贝、藻等名特优新品种产量占海水养殖产量的比重,由1978年的不足1%增至30%以上。

二,养殖区域不断扩大,养殖方式多样化

养殖方式更趋多样合理,不同养殖方式渐次出现

潮上带的围塘养殖、工厂化养殖

潮间带的播苗养殖

浅海实行筏式养殖、网箱养殖,

海底进行播苗增养殖,实行立体开发。

外海养殖得到拓展。

海产品淡养技术得到发展。

三,立足主业,大力发展多种经营

各地在发展水产养殖生产过程中,注重发挥行业优势,在抓好主业的同时,拉长产业链,积极发展第二、第三产业,形成一业为主,多种经营、全面发展的格局。

四,科学技术不断进步,技术水平和综合开发能力增强

对虾、鲍鱼、扇贝、海带、大黄鱼、青蟹、梭子蟹、牙鲆等品种的育苗和养殖技术的完善、推广,使养殖生产获得了前所未有的迅速发展。

混养、轮养、套养、间养技术普遍应用于海水养殖业

河蟹、罗氏沼虾、刀额新对虾、南美白对虾等海水生淡水长(或可长)优良品种增养殖技术的突破,推动了内陆水产养殖业向着高产、优质、高效的方向发展。

五,基础设施和服务体系建设得到进一步加强

初步形成了适应生产发展的服务体系多层次、多方面和多种形式的从苗种、饲料、物资供应到技术服务。

多层次、多形式的专业化、系列化和社会化服务体系正在建立和逐步完善。服务方式从过去的行政指导型转向经营服务型,社团组织或行业协会的作用得以充分发挥,把分散的养殖专业户和生产单位组成集团公司、产业协会、经济联合体,通过社团组织为生产者提供产前、产中、产后的服务。

阅读理解

阅读理解。

                                                                       TYPING

      This course is for those who want to learn to type, as well as those who want to improve their typing.

The course is not common. You are tested in the first class and begin practicing at one of eight different

skill levels. This allows you to learn at your own speed. Each program lasts 20 hours. Bring your own paper.

     Course fee (费用): $125                                       Matericls: $25

     Two hours each evening for two weeks. New classes begin every two weeks. This course is taught by

a number of professional business education teachers who have successfully taught typing courses before.

                                                  UNDERSTANDING COMPUTERS

     This twelve-hour course is for people who do not know very much about computers, but who need to

learn about them. You will learn what computers are, what they can and can't do and how to use them.

     Course fee: $75 Jan.4,7,11,14,18      Wed.& Sat. 9:00-11:30 a.m.      Equipment fee: $10

      David is a professor of Computer Science at Beijing University. He has over twenty years of experience

in computer field.

                                                                    STOP SMOKING

     Do you want to stop smoking? Have you already tried to stop and failed? Now is the time to stop smoking

using the latest methods. You can stop smoking, and this twelve-hour course will help you do it.

      Course fee: $30      Jan.2.9,16,23      Mon.2:00-5:00 p.m.

     Dr. John is a practicing psychologist who has helped hundreds of people stop smoking.

1. If you choose the UNDERSTANDING COMPUTERS course, you will have classes _____.

A. from Monday to Sunday

B. on Wednesday and Saturday

C. on Saturday and Sunday

2. How long will the STOP SMOKING course last?

A. For four weeks.

B. For three hours.

C. For a week.

3. Mr. Black works every morning and evening, but he wants to take part in one of the three courses. 

   What is suitable for him?

A. TYPING

B. UNDERSTANDING COMPUTERS

C. STOP SMOKING

4. If you want to learn about computers and the same time you want to improve your typing,

    how much will you pay for it?

A. $75.

B. $150.

C. $235.

5. What's the special difference between the TYPING course and the other two?

A. People with different skill levels may learn at different speed.

B. You will take a test after the course.

C. You will pay less money.

选择题