搜搜考试网英语说明文求一篇英语的说明文。老师让找一篇文章评一下。1000字左右。多谢！
来源：学生作业帮 编辑：搜搜考试网作业帮 分类：综合作业 时间：2024/05/09 02:48:12
英语说明文
求一篇英语的说明文。老师让找一篇文章评一下。1000字左右。多谢！
求一篇英语的说明文。老师让找一篇文章评一下。1000字左右。多谢！
You will be the production of bone specimens toad it?
Today, participated in a biological extra-curricular activities, the activities of the leader of a group of people requires us to cooperate, to make a toad bone specimens.
The toads live, in the hands of grasping, looking at its bulging eyes and swelling on the skin of the skin, is a bit scary. However, you have to dissect it and make way bone specimens, it is very interesting. If you are interested, I have to tell us about the practice.
The first process is the anatomy.
The first step; put to death. There are two ways: one is to use it ether anesthesia; and the other is the use of its probe of the central nervous system damage - first in the chest with a knife in its designated "T"-shaped, uniform can not pay attention to when Wang broke sternum, Then use the probe in the spine in more than a few boring, boring time to light, so broken spine. At this time, the destruction of the central nervous system of the toad has been unconscious.
The second step: peeling. Tear from the chest down, and then start from scratch to tear down the back, so it off to a good skin. If you go to any tear, will be torn skin bones, do not come out of the integrity of the specimen.
Step three: In addition to the internal organs. Section with a knife, carefully remove the internal organs. Water and then wash its body so that the internal anatomy of the body after the toad's clear at a glance on the structure.
Step four: to muscles. Will be washed into the toad in hot water 5 minutes, took out after excluding the large muscle. Then use the copper wire put on the spine, and then pick the meat, so good tick, I am sorry to the spine. Special attention should be paid, in the four claws removed before and after the meat should be cautious not to paw the Nongsan. Also noted that the skull to complete, not to break up. But the two pieces of bone under a black substance, first remove bone to pick "black object", then glue the two pieces of bones stick good.
In this way, the toad to do a good job of the bone specimens, which looked at samples of the hearts poured out of a sense of accomplishment Zhenbu Xiao.
Today, participated in a biological extra-curricular activities, the activities of the leader of a group of people requires us to cooperate, to make a toad bone specimens.
The toads live, in the hands of grasping, looking at its bulging eyes and swelling on the skin of the skin, is a bit scary. However, you have to dissect it and make way bone specimens, it is very interesting. If you are interested, I have to tell us about the practice.
The first process is the anatomy.
The first step; put to death. There are two ways: one is to use it ether anesthesia; and the other is the use of its probe of the central nervous system damage - first in the chest with a knife in its designated "T"-shaped, uniform can not pay attention to when Wang broke sternum, Then use the probe in the spine in more than a few boring, boring time to light, so broken spine. At this time, the destruction of the central nervous system of the toad has been unconscious.
The second step: peeling. Tear from the chest down, and then start from scratch to tear down the back, so it off to a good skin. If you go to any tear, will be torn skin bones, do not come out of the integrity of the specimen.
Step three: In addition to the internal organs. Section with a knife, carefully remove the internal organs. Water and then wash its body so that the internal anatomy of the body after the toad's clear at a glance on the structure.
Step four: to muscles. Will be washed into the toad in hot water 5 minutes, took out after excluding the large muscle. Then use the copper wire put on the spine, and then pick the meat, so good tick, I am sorry to the spine. Special attention should be paid, in the four claws removed before and after the meat should be cautious not to paw the Nongsan. Also noted that the skull to complete, not to break up. But the two pieces of bone under a black substance, first remove bone to pick "black object", then glue the two pieces of bones stick good.
In this way, the toad to do a good job of the bone specimens, which looked at samples of the hearts poured out of a sense of accomplishment Zhenbu Xiao.