北师大版高中英语必修模块4Unit 10 Advertisements同步练习1．electrical与electric
（1）electrical指关于电的知识或电的研究内容。 All the electrical work was done by my brother. 我xx把所有与电有关的工作都做了。 An electrical engineer电气工程师 Electrical energy电能
（2）electric指以电为动力进行工作的装置。 an electric fan电风扇 an electric lamp电灯 an electric bell电铃 an electric torch（手）电筒 an electric stove电炉 an electric iron电熨斗 an electric current电流 an electric waves电波
（3）拓展：electrician电工electricity电electrify使……电气化；使通电；使带电
2．signal指（传递信息、命令等的）信号，手势，声音，暗号。 The look-out ship made signals that the enemy was in sight. 瞭望船发出信号，以示发现了敌。人
1 / 10
The train stopped at the red signal. 列车遇到红灯而停了下来。
The referee blew his whistle as a signal for the game to begin. 裁判员吹哨表示比赛开始。 sign指“记号，符号”，是普通用语。 Written music uses lots of signs. 乐谱用很多符号表示。
Mark指“记号，符号”，是书面的印记。 Who made those ink marks on my new book? 我的新书上这些xx是谁弄的? Don’t put a mark on the umbrella. 不要在伞上作记号。
3．focusn.(兴趣、活动等的)焦点，中心
Liu Xiang became the focus of everyone’s attention after winning the Olympicgold medal.
刘翔获得奥运会金牌后成了大家关注的焦点。 Topics in Focus is a quite popular TV program. 焦点访谈是很受欢迎的电视节目。 拓展：in focus焦点对准；清晰 out of focus焦点没对准，模糊 bring …into focus对好焦距；使……明确
2 / 10
focusv．调焦距；集中
I focused the camera on the lovely dog. 我把照相机的焦点对准了可爱的xx。
He must be very tired today; he doesn’t seem to focus at all. 他今天一定很疲倦了，好像思想一点都不集中。 练习一
用适当的词填空： 1．electricelectrical
①The murderer was sent to the _____ chair.
②My brother graduated from Peking University majoring in _____
engineering.③Out company products include _____ hairdryer, clock and so on.
Key:①electric②electrical③electric 2．practicepractisepractical
①If you want to make progress, you should do more ______. ②I spent two hours ______ drawing during the summer holidays. ③When you come across the _____ problems, come to ask me. Key:①practice②practising③practical 3．useusefuluseless
①It is ____ to do eye exercises every day. ②The little boy knew it was _____ to cry any more. ③The type of car ____ a lot of petrol.
3 / 10
北师大版高中英语必修模块4Unit 10 Advertisements 同步练习1
