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问题 问答题 简答题

什么是静电噪声？

答案

参考答案：因静电放电而形成的电磁骚扰，它可能与有用信号叠加或组合，从而影响组件、设备和系统的正常工作。

写作题
书面表达。
下面是一张互联网上的招募启示，根据启示内容和英语提示，写一封不少于50词的申请信。信的开头和结尾已为你写好。
                                                                        Notice
       In order to help foreigners who come for the 2008 Olympic Games, Beijing Volunteer Association
(北京志愿者协会) will recruit (招募) 3000 volunteers for the programme of Beijing English Speaking
Team.
Requirements:
1. Enjoy helping people.
2. Have a good sense of teamwork.
3. Be good at daily English and able to talk to foreign guests fluently. (流利地)
4. Have experience with this kind of work.
       If you want to be one of the volunteers, please email us your application (申请书) in English before
May 31, 2006. Log on (登陆) to the Association website: www.bjvolunteer.org
       Suppose (假设) you are Li Mei from Beijing No. 5 Middle School, and you want to be one of the
volunteers. Write an email application.
Dear Association member, 
                                                                                                                                                              
                                                                                                                                                              
                                                                                                                                                              
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单项选择题

脑脓肿的最佳手术时期是（）

A.急性脑炎期

B.脑化脓性感染期

C.包膜形成初期

D.包膜完全形成期

E.恢复期
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