那是3年前夏天的一个夜晚,弯弯的月牙挂仵树梢,密密麻麻的繁星像,颗颗珍珠撒在天空。我和妹妹、爸爸在操场上乘凉。妹妹说:“我们来比数星星好吗?”我说:“好啊!我准赢!””于是妹妹当裁判,我和爸爸比赛。
比赛开始了,我紫张地数着:“1、2、3、4、5……”,我敉到106的时候,突然飘来-片白云,遮住了我正要数的星星,唉呀、怎么往下数呢?哎呀白云,你早不来,晚不来,偏偏这时候来捣乱!
我只好重数:“1、2、3、4、5……”数着数着,妹妹忽然叫了起来:“哥哥你看,会飞的星星!”果真有一颗流星从我头顶别过。多美啊,我这还是头一回看见哩!唉呀,刚才数到多少?流星啊流星,你尽管很美,但来得太不是时候了!
我偷偷瞥了一眼爸爸,他可自在呢,缓缓地摇着扇子,很有一点诸葛亮的样子。唉,没法子,我又得重数。我仰着头,脖子渐渐酸了,眼睛也模糊了,像萤火虫似的在眼前飞舞。这吋候。妹妹大声嚷逍:“时间到了”我慌了,到底有多少星星呀?我数不下来,眼肴这场比赛输定了。我想爸爸大概也数不下来吧,便急中生智对爸爸说:“爸爸,你先说。”爸爸说:“你先说。”选妹妹说-“你们各人把数字写在纸上”我只好乱写一个数,爸爸见了,哈哈大笑起来,我问爸爸:“笑啥?”“傻孩子,天上的星虽多着呢,光银河系就有1000亿颗以上的星,肉眼能数得清吗?”‘‘什么?1000亿颗以上的星星?”我简直不敢相信自己的耳朵。爸爸进屋拿出一本书翻给我看,书上果然是这么说的。我这才明白:原来爸爸的肚子里装着书啊!
打这以后,我开始知道书的用处了。
to prevent H7N9 we should know some common sense. First of all, it is important for us to prevent H7N9 from ourselves. For example, clean our hands frequently.
Sencondly, do more exercises. Such as running. Lastly, change our diet to keep balence. For example, eat more types of vegetables and drink more water
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.
Expert tips on how to prevent avian influenza H7N9 collated by current argument data dictionary
1.平时加强体育锻炼,多休息,避免过度劳累,不吸烟,勤洗手;注意个人卫生,打喷嚏或咳嗽时掩住口鼻。
1 usually strengthen physical exercise, rest more, avoid excessive overworked, do not smoke, wash their hands; pay attention to personal hygiene, when sneezing or coughing and cover your nose and mouth.
2.保持室内清洁,使用消毒液清洗的地毯,避免使用难以清洗的地毯,保持地面、天花板、家具及墙壁清洁,确保排水道通畅;保持室内空气流通,应每天开窗换气两次,每次至少10分钟,或使用抽气扇保持空气流通;尽量少去 空气不流通的场所。
2 keep the room clean, use disinfectant cleaning carpets, avoid the use of hard to clean the carpet, keep the floor, ceiling, furniture and walls clean, to ensure smooth drainage channel; maintains the indoor air circulation, ventilation windows should be at least two times a day, 10 minutes each time, or use a fan to keep air circulation; as little as possible to airless places.
3.注意饮食卫生,进食禽肉、蛋类要彻底煮熟,加工、保存食物时要注意生、熟分开;养成良好的卫生习惯,搞好厨房卫生,不生食禽肉和内脏。解剖活(死家禽、家畜及其制品后要彻底洗手。
3, pay attention to food hygiene, eating meat, eggs should be thoroughly cooked, processing, preservation of food to the attention of raw, cooked separately; develop good health habits, good kitchen hygiene, do not eat raw poultry meat and offal. Anatomy of living (dead to wash hands thoroughly, livestock and poultry products.
同时,在户外洗手不方便的时候,可以使用免洗洗手液,随身携带,随时随地隔离病菌,呵护您的健康。
At the same time, when the outdoor hand-washing is not convenient, can use hand sanitizer, carry whenever and wherever possible, isolate the pathogen, take care of your health.
4.发现疫情时,应尽量避免与禽类接触;公众特别是儿童应避免密切接触家禽和野禽。
4 found in the epidemic, should avoid contact with poultry; the public especially children should avoid close contact with poultry and wild birds.
5.注意生活用具的消毒处理。禽流感病毒不耐热,100°C下一分钟即可灭活。对干燥、紫外线照射、汞、氯等常用消毒药都很敏感。
5 pay attention to disinfection and living appliances. Avian influenza viruses do not heat, 100 ° C, one minute can be inact
1.看,这些大数含有三级,你会读吗?这些数有什么特点?你能将它们改写成用“亿”作单位的数吗?对于学生举得例子中整亿的数,老师放手让他们自己改写(比较简单),改写后,说一说怎样改写的,应注意什么?
2.不是整亿的数省略亿后面的尾数求近似数,老师也是给学生充足的空间时间,自己尝试做一做。汇报交流时,重点强调,省略亿位后面的尾数关键要看哪一位上的数是否满五?
总之,学生自己能学会的知识,老师绝不包办代替,给学生留有空间,鼓励他们大胆尝试,利用已有的知识和学习方法自主探索,解决新的问题,提高数学能力。
比赛开始了,紧张的.数着“一、二、三、四……”,当我数到106时,突然空中不知飘来什么东西,像白云一样遮住了我正要数的星星。我急了,在心里不禁埋怨起来:云儿呀云儿,你为什么早不来晚不来,偏偏这时候来捣乱?我只好耐着性子重数“一、二、三、四……”,数着数着,妹妹突然叫起来:“姐姐,姐姐你看,会飞的星星!”当我抬头望着深黑色的夜空时,突然眼前一亮,一个拖着长长尾巴的流星从天空飞驰而过,好漂亮的流星,我第一次见到。唉呀,刚才我数到哪儿了?流星啊流星,你尽管很美,但你来得太不是时候了。我偷偷瞥了一眼爸爸,他可自在,跷着二郞腿,很有一点诸葛亮的味道。唉,我只好重数。我仰着头,脖子渐渐酸了,眼睛也模糊了,星星像萤火虫在脑门顶上飞舞。妹妹的吵嚷声解救了我,她大声的喊:“停,停,时间到了。”我慌了,眼看就要输了,怎么办呢?我灵机一动,就编了一个数,爸爸哈哈大笑起来,我问他:“爸爸你笑啥,你数了多少颗星星?”“傻孩子,天上的星星无数颗,像头发一样是数不过来的。”从这件事中我总结出:我还要多读书,这样就会知道好多关于星星的常识,就不会白挨刚才的累。
高尔基先生曾说过:“书籍是人类进步的阶梯。”多读书,可以让你变聪明,变得有智慧去战胜对手。
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