四川邮电职业技术学院教案专用纸 语为 communication system,谓语是 gIves. which引出定语从句,用以 修饰 communication system.句中的 from any place, at any time和 any distance三个部分是并列的。 2. ia A]: Urgent communications (police, firemen, hospitals, etc.) which could not be established because of no reply at one end of the link could have dramatic consequences if the delay in response is too long or if the call remain unanswered) 分析:本句谓语为 could have, which引出定语从句以修饰主语 Urgent ommunications.句中的连词or连接两个由if引出的状语从句 2mins ia f]: Paging solutions to the above communication situations were introduced in the first half of this century by means of simple optical and acoustical signaling devices installed on the premises of enterprises hospitals offices etc 分析:主语是 paging solutions,谓语是 were introduced.过去分词 installed作 devices的后置定语。 4 mins ia a]: Such a signal meant that the person concerned had to call the switchboard operator immediately for instructions from the closest telephone. 分析:主语是 deve loping paying service,过去分词 defined, designed I mins 修饰主语,本句因主语太长了,为避免头重脚轻,故采用了倒装结构。 iaif]: Thus was born a new, but perpetually developing paging service defined as a one -way selective signaling system wi thout speech and desi gned as an extension of the telephone network. 分析:本句主语是 developing paying service,过去分词 defined, designed修饰主语。本句因主语太长了,为避免头重脚轻,故 采用了倒装结构。 ia f]: The unquestionable success of the first generation of paging systems using wired networks with signaling devices was followed in the early 1950s by technological progress in the miniaturization of electronic circuitry. 分析:本句中 using wired networks这一现在分词短语作定语,相当于 which/ that use wired networks相同的用法还有本段的下一句,及para4 的 lst sentence To obtain a two-way system would require the use of portable mobile telephones, such as terrestrial cellular packet radio systems which are presently gaining popularity in networks 分析: which引导一个非限定性定语从句,修饰 systems。句中 the use of portable mobile telephones意为“使用便携式移动电话”。这种“n+prep. .”的结构有动词的意义 Iv. Post-reading Activities 1. Review the important expressions, phrases, sentences and translation skills learnt in the study of the text Page 4 of 5 Teaching Plan of English for Telecommunications四川邮电职业技术学院教案专用纸 Page 4 of 5 Teaching Plan of English for Telecommunications Unit 8 语为 communication system，谓语是 gives .which 引出定语从句，用以 修饰 communication system.句中的 from any place ,at any time 和 at any distance 三个部分是并列的。 2.语句：Urgent communications (police ,firemen ,hospitals, etc.) which could not be established because of no reply at one end of the link could have dramatic consequences if the delay in response is too long or if the call remain unanswered). 分析：本句谓语为 could have ,which 引出定语从句以修饰主语 Urgent communications.句中的连词 or 连接两个由 if 引出的状语从句。 语句：Paging solutions to the above communication situations were introduced in the first half of this century by means of simple optical and acoustical signaling devices installed on the premises of enterprises ,hospitals ,offices ,etc . 分析：主语是 paging solutions,谓语是 were introduced .过去分词 installed 作 devices 的后置定语。 语句:Such a signal meant that the person concerned had to call the switchboard operator immediately for instructions from the closest telephone. 分析：主语是 developing paying service ,过去分词 defined ,designed 修饰主语，本句因主语太长了，为避免头重脚轻，故采用了倒装结构。 语句：Thus was born a new ,but perpetually developing paging service defined as a one-way selective signaling system without speech and designed as an extension of the telephone network. 分析：本句主语是 developing paying service ,过去分词 defined ,designed 修饰主语。本句因主语太长了，为避免头重脚轻，故 采用了倒装结构。 语句：The unquestionable success of the first generation of paging systems using wired networks with signaling devices was followed in the early 1950s by technological progress in the miniaturization of electronic circuitry. 分析：本句中 using wired networks 这一现在分词短语作定语，相当于 which/that use wired networks 。相同的用法还有本段的下一句，及para4 的 1st sentence. To obtain a two-way system would require the use of portable mobile telephones, such as terrestrial cellular packet radio systems, which are presently gaining popularity in networks. 分析：which 引导一个非限定性定语从句，修饰 systems。句中 the use of portable mobile telephones 意为“使用便携式移动电话”。这种“n+ prep. +n.”的结构有动词的意义。 IV. Post-reading Activities 1. Review the important expressions , phrases, sentences and translation skills learnt in the study of the text. 2mins 4 mins 1 mins