描迷电场的电力线总是起始于正电荷，终止于负电荷，电力线既不闭合、不间断、不相交。

Advice to English learners

Learners of English, especially self-taught learners may have trouble in understanding speeches by native speakers. The following ways might help improve their ability.

First of all, do things step by step. It is not good to listen to something beyond your level. Better choose a suitable course and start with the first book. Go on to the second book only after you are sure you understand the first one.

Secondly, stick to one course of study. Don’t change books often. Never let your attention be attracted by another course just because it seems to be more “ fashionable”(时髦).

Thirdly, listen to the English news programme over the radio from time to time. Better go through the news stories in the Chinese-language newspaper first. That will make it easy for you to understand the English news on the radio.

Fourthly, if you have time, listen to some interesting stories in “special English” from the VOA or other listening materials of the same level as that of your textbook.

小题1:This is a piece of advice to learners of English in how to_____.

A．improve their listening ability

B．read fast

C．write better English and read fast

D．speak correctly小题2: If you want to understand the English news programme on the radio, you should_________.

read the Chinese-language newspaper carefully

read again and again the Chinese-language newspaper

go through the Chinese-language newspaper

be able to recite the Chinese-language newspaper

小题3:“Beyond your level” means something_______.

A．easy for you

B．too difficult for you

C．not too easy and not too difficult for you

D．just all right for you小题4: The author advised that once you have taken up a course, you should_______.

stick to it                                   B. begin with the last book

C. take up other courses if you are more fashionable     D. not do anything else

小题5:In this passage, VOA stands for______.

A．a book

B．a magazine

C．a textbook

D．a radio station

结合所学知识，分析右表信息，选择下列正确的说法

我国不同经济成份在国民经济中的比重
年  份	1978	1997	2007
公有制（%）	99.1	75.8	35
非公有制（%）	0.9	24.2	65

①我国非公有制经济的主体地位越来越突出

②非公有制经济是社会主义市场经济的重要组成部分

③在我国经济舞台上，公有制经济不再唱主角了

④改革开放是引起右表中经济成份比重变化的主要原因

A．①②           B．①④   C．①②③        D．②④

FOCKE350小盒包装机干燥成型输出系统由（）、传递转塔、干燥鼓三部分。

A.烟盒导轨

B.胶水缸

C.提升器

D.模盒

教育信息化的一个主要特征是全面提高教师和学生的信息素养。下面选项是哪项不属于信息素养。（）

A、信息意识

B、信息知识与技能

C、利用和创造信息

D、有自己的网站

《中国药典》2010年版规定的注射用水是（）

A.蒸馏水

B.无热原的蒸馏水

C.纯化水

D.去离子水

E.反渗透法制备的水