1. to know the origin, operation and disadvantages of asynchronous serial data transmissioneaching 2. to understand the main idea and organization of the tex Objective

1. to know current situation and the future in the telecommunication world Teaching 2. to understand the main idea and organization of the text

1. Detailed analysis of difficult sentences in the text; 2. the usages of pastparticiple phrases; 3. Affix: inter-, multi

Word13 multimedia[. mAl i''midjn.多媒体 describe[dis k]v.描述,形容 mixture['m tfan.混合,混合物 consequent['kon wan]a.作为结果的,随之发生的

1.1 单片机的发展历史 1.2 MCS-51单片机的主要功能

15.1步进电机控制 15.2频率量的测量 15.3频率脉冲的测量周期法

NEW WORDS AND PHRASES vISIonary[ vita n ari]n.幻想家,梦想家 contribute [kan tribju]v.捐献,贡献 kan]adv.重大的,效果显著的,具有特殊意义的

1. The Internet is the largest repository of information which can provide very very large network resources. The network resources can be divided into

asynchronous[a'si6 k ranas]a.异步的 serial[' sirian]a.串行的,串联的 transmission[ t raen z'mi∫an]a.传输,发送 interface[ i n taf e i s]r.接口

11, Circuit Switching and Packet Switching destination[. de ti' n e i jan]n.目的地,终点 allocate[' aelak e i t]vt.分配,分派,配给 release[ri'li:s]vt.释放,放松,发布 Jargon[吗a:gan]n.行话,土语