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。
分类法就是把说明的对象,按一定的标准划分成不同类别分别加以说明的方法。如:上述范文介绍人生的三种目标,并按照时间的长短对终生目标、长期目标和短期目标做了分类说明。
适合这类题型的阅读理解通常具体反映在文章的题目或一段短文的小标题上;很多文章从一开头就直接说出观点,表达中心思想。所以对于这类题型,一定要提示学生注意主题句和主题段,绝大多数的短文类似于语文的老三段,注意段与段之间的联系,注意隐藏的中心思想,准确了解文章结构,把握句与句之间的关系,注重逻辑关系,把握住文章的脉络即可。
How to prevent the H7N9?
As is well known,the A flu is spreading throught our country. However, if we negnect it, the deadly H7N9 may cause more infectors,or even more deaths. So what is the most important is that we should take some effective measures to prevent it.They can be listed as follows.
Firstly,it is necessary for you to realize the Avian flu can be prevented if you develop good living habits. For example,you shouldn’t forget to wash your hands before meals.Besides,don’t spit everywhere and try to cover your mouth or nose with paper or hankerchiefs when you have to cough or sneeze.What’s more, remember to wear the mouth-cover if you have to go to the public places, such as the crowded cinemas,supermarkets, buses,where the A flu may spread easily.
Secondly,of course, taking exercise more often and taking good sleep to build your body are wise choices for you to reduce the risk of being infected.
Last but not the least, if you are unlucky to be infected with the slight flu cold, try to stay at home,and take some medicine. Do pay attention to your daily body temperature. If you have a high fever, go to the hospital without delay for further treatment. Make sure you are not expected to come back to school before the cold or flu is cured.
Only by doing like this can you prevent or defeat the A flu in the end.
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