设计题目(6)英文字母显示1
基本要求:
1.能用数码管自动一次显示出字母L、P、H、F、E、D、C、B、B、C、D、E、F、H、P、L;然后再从头循环,电路上电从L开始显示。
1、概括文章内容或故事情节2、揭示主题,是文眼3、是贯穿全文的线索4、新颖别致,吸引读者阅读兴趣。5、是人物形象的象征6、设置悬念(读后脑中出现为什么)7、描写的对象
数字法是运用数据来表明事物的本质和特点,准确合理的数据使文章精确可信。
【例】
(1Nearly half of all Americans over age 20 wear a bridge or denture,and more than 20 percent have complete upper and lower denture. By age 50, one out of every two persons has gum disease.
(2And it seems sensible to wait. One quarter of all marriages between people under twenty-one end in divorce. In Britain in 1972, there were 124,248 divorces.
说明文的说明方法除上面介绍的常见的几种以外,还有诸如分项法、列举法、比喻法及引用法等,只有综合运用多种说明方法,才能多角度、多层次地全面、清晰、准确地展示客观事物的本来面貌。
定义法是用下定义的方式去揭示事物本质特征或概念内涵。它能使读者迅速抓住本质属性和基本特点。此法的句型:
① … is a/the … of … which/that …② … relate to/involve/refer to …
【例】
(1Language is a system of arbitrary vocal symbols which is used for human communication. 语言是人类用来交际的任意性的语音符号体系。
(2Intermediate goals relate to outcomes during the next few years.
(3Short-term goals involve outcomes expected during the next 12 months.
首先写……然后……其次……最后……
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