无线电通讯

Based on the present situation of cheating with high-tech on the diffeenent kinds of exams,and the characteristics of university,this paper proposes some measures to prevent cheating with high-tech ,in order to improve the teaching quality and stricten the regula.

随着科学技术的发展，特别是在通讯、信息和无线电技术领域的快速发展下，一些高科技作弊手段开始涌入大学校园，严重影响了考试的公正、公平性。

Deliberate radiation or reradiation of electromagnetic waves so as to impair the usefulness of a specific segment of the radio spectrum that is being used by the enemy for communication or radar.

人为地辐射或反向辐射电磁波，使一段特定的无线电波谱的可用性削弱，而这一波谱段是由敌人的通讯或雷达所使用。

All of you are welcome to use VR2R and we hope you continue to support the Voluntary Radio Communication Support and Emergency Service of HARTS.

欢迎所有同好继续使用VR2R中继站，并支持本会的无线电支援服务及应急通讯服务。

Many wirelesses apply to product, communicate product and number''''s product want come into America market, all request FCC De approbation.

许多无线电应用产品、通讯产品和数字产品要进入美国市场，都要求 FCC 的认可。

Software radio terminals must be able to process many various communication standards. These communication standards are based on different master clock rates.

软体无线电必须处理不同种类的通讯标准，这些标准可能使用不同的系统频率。

"This depends on the precise radio frequency of the 21-cm wavelength, or 1420 megacycles per second."

这种通讯依靠的是2l厘米波段(或1420兆周)的精确无线电频率。

This depends on the precise radio frequency of the 21-cm wavelength, or 1420 megacycles per second.

这种通讯联系要靠21厘米波段，即每秒1420兆周的精确无线电频率。

Chelton Avionics group comprises 47 companies based in UK, US, Canada, France, Sweden, Austria and South Africa, and focuses on the design and manufacture of antennas, military and civil audio and radio systems, composites and radomes, microwave technology, search and rescue, homeland security equipment,electronic flight systems, network enabled communications equipment and the repair and overhaul of electronic equipment.

Chelton航空电子集团由位于英国、美国、加拿大、法国、瑞典、澳大利亚和南非的47家公司组成，致力于天线、军用和民用声频和无线电系统、复合材料和整流罩、微波技术、搜索救援、国内安全设备、电子飞行系统、网络通讯设备的设计和生产以及电子设备的维护和翻修。

Without sound transmission, communications can be made only by radio. Without air, the sky is pitch black.

由于声音不能传播，通讯只能借助于无线电；由于没有空气，天空中漆黑一片。

Patrolmen are equipped with two-way radios and GPS,the communication between them and command center is quite smooth.

巡逻警察都装备了无线电双向通讯系统和全球定位系统，他们和指挥中心的联系很通畅。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。