Give 3 main advantages of DSSS systems based on PN sequences.

Section B

Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.

听力原文： Hollywood produces many different kinds of films, including mysteries, musicals, love stories and horror films. Different these films may be, they generally have one thing in common —conflict. The main character wants something very badly and will do anything to get it. The opponent tries to stop the main character from achieving his goal. This opposition creates conflict, and conflict is the heart of drama. To give an example, let's say the main character is a young man of humble origin, who wants to marry the beautiful daughter of a rich banker. The father thinks the young man is unworthy of his daughter, and he does not allow her to see him. The young man, who is very much in love, refuses to give up without a fight. The conflict between the young man and the girl's father is what makes the story interesting. It forces these main characters to take action, and through their actions we see them as they really are. In a good story, the main character changes --he is not the same at the end of the story as he was at the beginning. He learns something from his experiences that makes him a different, perhaps a better person. And we learn something from watching him. Good movies not only entertain us, they also help us understand a little more about life.

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A．Having a love story.

B．Having violence.

C．Having conflict.

D．Having two main characters.

A、give further introduction

B、come to a conclusion

C、select the main ideas of the speech

D、none of the above

阅读理解：阅读下面的短文，根据文章内容进行判断，正确写“T”错误写“F”。

QUESTIONNAIRESA、ADVANTAGES & DISADVANTAGES

Every coin has two sides and questionnaires are no different. With questionnaires, the advantages outweigh the disadvantages.

ADVANTAGES OF QUESTIONNAIRES

Compared to face-to-face interviews, questionnaires are cheaper for

collecting data from a large number of respondents. Also, questionnaires are easy to analyze, and computer software can easily complete data entry and make tables for nearly all surveys. Questionnaires are familiar to most people as nearly everyone has had some experience completing one. Questionnaires reduce bias when there are no clues to affect the respondents.

DISADVANTAGES OF QUESTIONNAIRES

One main disadvantage of questionnaires is the possibility of low response rates which reduces our confidence in the results. Another disadvantage is they provide little flexibility for the respondents. What’s more, many times the respondent is not the same person you sent the

questionnaire to. Finally, questionnaires are not suitable for some people. For example, a survey to a group of poorly educated people might not work because of reading problems.

1. The advantages of questionnaire are more than disadvantages.{T、F}

2. Questionnaire is the cheapest way for collecting data from respondents.{T、F}

3. Questionnaires have the advantage of being analyzed easily through the computer software.{T、F}

4. Questionnaire is suitable for everyone.{T、F}

5. The respondent is usually the same person you sent the questionnaire to.{T、F}

What is the main purpose of the passage？

A．To please travelers.

B．To give the information of airline industry statistics.

C．To guide people to survive fires.

D．To provide safety advice.

A、Main generators.

B、Emergency generator.

C、Switchboards.

D、Loads.