关于英语作文3篇
无论是身处学校还是步入社会，大家总免不了要接触或使用作文吧，作文是人们把记忆中所存储的有关知识、经验和思想用书面形式表达出来的记叙方式。那么你知道一篇好的作文该怎么写吗？以下是小编为大家整理的英语作文3篇，欢迎大家分享。
英语作文 篇1
Hi, I’m Liu Xu. I’m 12 years old. My favorite animal is dog.
It’s name is Li Li. Li Li lives in China. It’s four years old. It’s kind of fun. l like to play with my dog. It likes to eat meat very much. It eats meat every day. Li Li is a clever and beautiful dog. l like Li Li very much. Because it’s interesting. And it likes to run very much. Maybe it thinks running is relaxing. This is my favorite animal. How about you?
英语作文 篇2
Do you know the weather about tomorrow and the day after tomorrow?I can tell you.
Tomorrow it will be cool.You should wear more clothes.The day after tomorrow morning it will be rainy.You should wear raincoat and take out the umbrealla.In the afternoon there will be a typhoon.Be careful everybody please!
英语作文 篇3
Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only within a narrow range around 37C;a departure of a few degrees from this value seriously impairs their functioning. Even though cells can survive wider fluctuations the integrated actions of bodily systems are impaired. Other animals have a wider tolerance for changes of bodily temperature.
For centuries it has been recognized that mammals and birds differ from other animals in the way they regulate body temperature. Ways of characterizing the difference have become more accurate and meaningful over time, but popular terminology still reflects the old division into warm-blooded and cold-blooded species; warm-blooded included mammals and birds whereas all other creatures were considered cold- blooded.
As more species were studied, it became evident that this classification was inadequate. A fence lizard or a desert iguana-each cold-blooded----usually has a body temperature only a degree or two below that of humans and so is not cold. Therefore the next distinction was made between animals that maintain a constant body temperature, called home0therms, and those whose body temperature varies with their environments, called poikilotherms. But this classification also proved inadequate, because among mammals there are many that vary their body temperatures during hibernation.
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