㈠ 新型冠状病毒的英语作文怎么写
As
for
me,
I
should
also
actively
contribute
my
own
strength
to
this
year's
new
year's
Eve,
do
not
visit
the
door,
do
not
have
a
dinner
party,
and
urge
my
family
to
do
a
good
job
in
health
and
epidemic
prevention.
I
have
to
go
to
public
places
and
wear
masks
in
a
standardized
way.
The
used
masks
are
thrown
into
the
"hazardous
waste"
bin
according
to
the
regulations.
Pay
attention
to
personal
hygiene,
often
ventilate,
wash
hands
frequently,
do
not
spit
everywhere,
and
make
correct
shelter
when
sneezing
and
coughing.
Study
at
home,
strengthen
exercise
and
protect
wild
animals.
The
bell
of
2020
has
been
ringing,
and
the
spring
is
not
far
away.
I
believe
that
with
the
joint
efforts
of
the
people
of
the
whole
country,
we
can
win
this
"battle"
and
usher
in
a
better
2020
in
my
heart!
翻译:
每年春节到来的时候,家家户户都张灯结彩,贴上了美丽的窗花,各种各样的大“福”字和春联,到处都是喜气洋洋的。
然而2020年的春节却完全不一样,一场不见硝烟,不闻炮响的战争打响了,不宣而战,“新型管状病毒“肺炎席卷而至,各地各部门积极响应,共同对抗疫情。白衣天使们,武警官兵们,志愿者们……。许许多多奋战在一线的勇士们,他们作为生命的逆行者,开启了2020的新篇章。
至于我,也应该积极奉献自己的一份力量,做到今年过年,不串门,不聚餐,督促家人做好卫生防疫,不得已去公共场所必须规范戴好口罩,使用过的口罩按规定丢入“有害垃圾“桶。注重个人卫生,常通风,勤洗手,不随地吐痰,打喷嚏咳嗽时应做出正确遮挡。在家开展学习,加强锻炼,保护野生动物。
2020年的钟声已经敲响,万紫千红的春天已经不远了,我想信在全国人民的共同努力下,我们一定能打赢这场“战役”,迎来我心中美好的2020!
㈡ 请你阅读材料并回答问题:材料一:传染性非典型肺炎是由冠状病毒的一个变种(即SARS病毒)引起的.其传播
传染病是指由病原体引起的,能在人与人之间、人与动物之间互相传染的一种疾病,传染病一般有传染源、传播途径和易感人群这三个基本环节,其中传染源是指能够散播病原体的人或动物,如流感患者等;传播途径是指病原体离开传播源到达健康人所经过的途径,如病人的排泄物,分泌物和传播疾病的生物或非生物媒介等;易感人群是指对某些传染病缺乏免疫力而容易感染该病的人群,如老人和小孩等.所以传染病缺少了任何一个环节,就流行不起来. (1)某人未得传染病之前属于易感人群,患病以后则属于传染源 (2)预防传染病的措施有控制传染源、切断传播途径、保护易感人群.传染源指的是能够散播病原体的人或是动物;传播途径指的是病原体离开传染源到达健康人所经过的途径;保护易感人群指的是对某种传染病缺乏免疫力而容易感染该病的人群.所以讲究个人卫生和环境卫生,这在传染病预防措施中属于切断传播途径.积极参加体育锻炼属于保护易感人群. (3)当病原体进入人体后会刺激淋巴细胞产生一种抵抗该病原体的蛋白质,叫做抗体,“非典”患者的体内已经产生了抵抗SARS病毒的抗体,因此注射痊愈后“非典”患者的血清能够治疗“非典”. (4)病原体侵入人体后,会刺激淋巴细胞产生抵抗该病原体的特殊的蛋白质----抗体,引起人体产生抗体的物质叫抗原.某种抗体只与刺激它产生的那种抗原结合,促进吞噬细胞吞噬病原体,或使病原体失去致病性.有的抗原被清除后,相应的抗体仍留在人体内,当同样的抗原再次侵入人体时,就会很快被体内存留的抗体按照同样的方式加以清除,从而起到预防传染病的作用,所以SARS属于抗原.注射“非典”疫苗会刺激人体免疫细胞产生一种抵抗该病原体的特殊蛋白质,叫做抗体,抗体能够协助吞噬细胞来消灭特定的病原体SARS病毒,这种免疫类型只对特定病原体起作用,对其它病原体无效,因此属于特异性免疫. 故答案为:(1)易感人群;传染源 (2)切断传播途径;保护易感人群. (3)抗体(4)抗原;注射;特异性免疫 |
㈢ 冠状病毒英语怎么写
冠状病毒英语为coronavirus。
coronavirus
读法:[kə,rəunə'vaiərəs]
释义:n. 冠状病毒;日冕形病毒
短语
1、SARS coronavirusSARS冠状病毒 ; sars病毒 ; 冠状病毒
2、Equine coronavirus马冠状病毒
3、novel coronavirus新型冠状病毒 ; 冠状病毒
4、coronavirus pneumonia冠状病毒肺炎
5、coronavirus igg冠状病毒
6、Canine coronavirus犬冠状病毒
7、coronavirus antibody冠状病毒抗体
8、Coronavirus infection冠状病毒感染
9、Rat coronavirus大鼠冠状病毒
例句
Theyfound thatfourof themasked palmcivets- whichhaveshortfur andblack and whitestripeson theirfaces-were carryingacoronavirusthat causedSars.
他们发现其中四只毛发较短、面部有黑白条纹的果子狸携带了一种能导致非典的冠状病毒。
㈣ 新型冠状病毒英语作文有吗
As
for
me,
I
should
also
actively
contribute
my
own
strength
to
this
year's
new
year's
Eve,
do
not
visit
the
door,
do
not
have
a
dinner
party,
and
urge
my
family
to
do
a
good
job
in
health
and
epidemic
prevention.
I
have
to
go
to
public
places
and
wear
masks
in
a
standardized
way.
The
used
masks
are
thrown
into
the
"hazardous
waste"
bin
according
to
the
regulations.
Pay
attention
to
personal
hygiene,
often
ventilate,
wash
hands
frequently,
do
not
spit
everywhere,
and
make
correct
shelter
when
sneezing
and
coughing.
Study
at
home,
strengthen
exercise
and
protect
wild
animals.
The
bell
of
2020
has
been
ringing,
and
the
spring
is
not
far
away.
I
believe
that
with
the
joint
efforts
of
the
people
of
the
whole
country,
we
can
win
this
"battle"
and
usher
in
a
better
2020
in
my
heart!
翻译:
每年春节到来的时候,家家户户都张灯结彩,贴上了美丽的窗花,各种各样的大“福”字和春联,到处都是喜气洋洋的。
然而2020年的春节却完全不一样,一场不见硝烟,不闻炮响的战争打响了,不宣而战,“新型管状病毒“肺炎席卷而至,各地各部门积极响应,共同对抗疫情。白衣天使们,武警官兵们,志愿者们……。许许多多奋战在一线的勇士们,他们作为生命的逆行者,开启了2020的新篇章。
至于我,也应该积极奉献自己的一份力量,做到今年过年,不串门,不聚餐,督促家人做好卫生防疫,不得已去公共场所必须规范戴好口罩,使用过的口罩按规定丢入“有害垃圾“桶。注重个人卫生,常通风,勤洗手,不随地吐痰,打喷嚏咳嗽时应做出正确遮挡。在家开展学习,加强锻炼,保护野生动物。
2020年的钟声已经敲响,万紫千红的春天已经不远了,我想信在全国人民的共同努力下,我们一定能打赢这场“战役“,迎来我心中美好的2020!
㈤ 关于冠状病毒的作文怎样写
尊敬的白衣天使:
你们好!
今年这个春节,是一个太特别的春节。因为疫情发展的太过迅速,你们放下了回家的行囊,停下了回家的脚步,义无反顾地选择坚守在抗疫的第一战线上。在这个阖家欢乐的日子里,我们在享受静好岁月,而你们却在负重前行,用爱守护着我们。
曾几何时,网络上称消防员是“最美逆行者”,当无情的大火肆虐,众人纷纷逃离时,他们却向着火光前行,只留下伟岸的背影。其实而在这场突如其来的疫情面前,你们又何尝不是“最美逆行者”。
在大家对病毒避之唯恐不及的时候,是你们递上了一张张“请战书”身先士卒奔赴在抗治疫情的最前线,哪一个人不是逆流而上,你们才是这个时代最可爱的人!
在这场没有硝烟的战争时期,我每天都有关注官方推送的关于疫情的消息,也因为这样我才“结识”了你们。
当我得知,17年前领军战非典的84岁的钟南山院士、以郭军主任为领队的清华大学附属北京清华长庚医院医护人员和全国各地医疗队义无反顾的驰援武汉,加入抗击疫情行列时,脑海中浮现着“携手无惧,为爱逆行”的字样;
当我看到一张张充满印痕、红肿的脸和一个个写在后背的名字时,我难以掩饰内心深处的悲痛以及敬意。你们也是爸爸、妈妈、儿子、女儿,你们的家人也在等你们回家团聚,
但你们依旧选择不顾个人安危,始终奋战在防治疫情第一线“舍小家,为大家”,我为你们点赞,更应该向你们学习。
在全国人民“众志成城,抗击疫情”之时,我不是像陈琳琳一样驰援武汉的医疗队员,不是像韩红基金会一样的后方援助手,而是一名2020年参加高考的考生也是一名刚刚成年的孩子。在这个特殊的时期,我也有责任、义务贡献自己微弱的力量。
首先,我和家人也会停下出行的脚步,不为你们添堵添乱。其次,我也会在家合理安排学习和生活,积极的备战高考。最后,我相信只要我们一起努力,疫情就一定会被击垮,我们就一定会取得胜利。
请你们保护好自己的同时抗击疫情,此时的全国人民都已点亮自己心中的光,前方再暗的路都会被照亮。也请你们相信,前路无惧让我们携手并进用爱去温暖更多的人。
祖国定会像战胜03年非典和H7N9禽流感一样战胜这次的冠状病毒,我们等着你们的捷报传来!
㈥ 关于新型冠状病毒的作文怎么写
2020年的春节,在所有中国人的心里,注定是一个永生难忘的记忆。新型冠状病毒的肆虐,让辞旧迎新的钟声更加沉重,人们脸上的那一个个口罩,让这个春节倍感冷清。
这个冬天,梅花依然宁静地开放;这个冬天,蓝天依旧明净如洗;这个冬天的武汉却非常艰难,全国人民却非常艰难。在这特殊的日子里,我们谨遵医嘱,静静地待在家中。我们为武汉忧心忡忡,我们为治愈病例的增多而感到高兴,为武汉的人们牵肠挂肚。
与此同时,有一群人,他们正冲在前方,用自己的平凡之躯为身后的亿万中国人筑起防护的堡垒,他们舍小家为大家,不眠不休,战斗在这场没有硝烟的战场上的最前沿。他们是来自全国各地的最美逆行者,他们是新时代的最美先锋人物,他们是可亲可敬的白衣天使。
在这群人当中,有一位84岁的老院士,叫钟南山,17年前,这位老院士奋斗在抗非的最前线上,为抗击非典立下了汗马功劳。17年后的今天他临危受命,搭上前往武汉的高铁,再次前往抗击疫情的前线;86岁的董宗祁老教授,他坐在轮椅上,一上午看了30多个病人,他说:“我这辈子,就是为了救人”;73岁的李兰娟教授,知道国家有难,她毫不犹豫前往武汉,坚定地说出她的誓言:“我打算长期待在武汉,与那边的医护人员一起奋斗!”
这世上哪有什么岁月静好,只是因为有人在替我们负重前行罢了,这世上哪有什么天生的英雄,只有因为人们需要,才有人愿意牺牲自己成为英雄。
虽然我不知道他们是谁,但我明白他们是为了谁。他们也许并不富裕,甚至有些贫穷;他们也许并不高大,甚至有些瘦弱;他们也许并不光鲜,甚至有点卑微,他们的形象在我心中是那样模糊,但他们的精神在我心中却是那样鲜明;不计生死,不求回报,默默坚守的他们,守护着健康,保卫着生命。
普通的我们无法到达正面战场与病毒作战,我们只能做好我们的后勤工作,不出门,少出门,勤洗手,戴口罩,这是为了不给他们添麻烦,祝愿他们平安早日凯旋。
彩虹为证,千古不变,我要高歌。为生命喜悦,万物都歌颂你的慈爱,大地诉说你的恩情。
致敬白衣天使!
致敬最美逆行者!
致敬抗击疫情的每一个人!
㈦ 谁能帮我找一篇与微生物有关的英文文章``````
http://en.wikipedia.org/wiki/Microorganism
http://zh.wikipedia.org/wiki/%E5%BE%AE%E7%94%9F%E7%89%A9
A microorganism (also can be spelled as micro organism) or microbe is an organism that is microscopic (too small to be seen by the naked human eye). The study of microorganisms is called microbiology, a subject that began with Anton van Leeuwenhoek's discovery of microorganisms in 1675, using a microscope of his own design.
Microorganisms are incredibly diverse and include bacteria, fungi, archaea, and protists, as well as some microscopic plants and animals such as plankton, and popularly-known animals such as the planarian and the amoeba. They do not include viruses and prions, which are generally classified as non-living. Most microorganisms are single-celled, or unicellular, but some multicellular organisms are microscopic, while some unicellular protists, and a bacteria called Thiomargarita namibiensis are visible to the naked eye.
Microorganisms live in all parts of the biosphere where there is liquid water, including hot springs, on the ocean floor, high in the atmosphere and deep inside rocks within the Earth's crust. Microorganisms are critical to nutrient recycling in ecosystems as they act as decomposers. As some microorganisms can fix nitrogen, they are a vital part of the nitrogen cycle, and recent studies indicate that airborne microbes may play a role in precipitation and weather.
Microbes are also exploited by people in biotechnology, both in traditional food and beverage preparation, as well as modern technologies based on genetic engineering. However, pathogenic microbes are harmful, since they invade and grow within other organisms, causing diseases that kill millions of people, other animals, and plants.
History
Evolution
Single-celled microorganisms were the first forms of life to develop on earth, approximately 3–4 billion years ago.Further evolution was slow,and for about 3 billion years in the Precambrian eon, all organisms were microscopic. So, for most of the history of life on Earth the only form of life were microorganisms.Bacteria, algae and fungi have been identified in amber that is 220 million years old, which shows that the morphology of microorganisms has changed little since the triassic period.
Most microorganisms can reproce rapidly and microbes such as bacteria can also freely exchange genes by conjugation, transformation and transction between widely-divergent species.[10] This horizontal gene transfer, coupled with a high mutation rate and many other means of genetic variation, allows microorganisms to swiftly evolve (via natural selection) to survive in new environments and respond to environmental stresses. This rapid evolution is important in medicine, as it has led to the recent development of 'super-bugs' — pathogenic bacteria that are resistant to modern antibiotics.
Pre-Microbiology
The possibility that microorganisms might exist was discussed for many centuries before their actual discovery in the 17th century. The first ideas about microorganisms were those of the Roman scholar Marcus Terentius Varro in a book titled On Agriculture in which he warns against locating a homestead near swamps:
“ …and because there are bred certain minute creatures which cannot be seen by the eyes, which float in the air and enter the body through the mouth and nose and there cause serious diseases.”
This passage seems to indicate that the ancients were aware of the possibility that diseases could be spread by yet unseen organisms.
In The Canon of Medicine (1020), Abū Alī ibn Sīnā (Avicenna) stated that bodily secretion is contaminated by foul foreign earthly bodies before being infected.He also hypothesized that tuberculosis and other diseases might be contagious, i.e. that they were infectious diseases, and used quarantine to limit their spread.
When the Black Death bubonic plague reached al-Andalus in the 14th century, Ibn Khatima wrote that infectious diseases were caused by "contagious entities" that enter the human body. Later, in 1546, Girolamo Fracastoro proposed that epidemic diseases were caused by transferable seedlike entities that could transmit infection by direct or indirect contact, or even without contact over long distances.
All these early claims about the existence of microorganisms were speculative in nature and not based on any data or science. Microorganisms were neither proven, observed, nor correctly and accurately described until the 17th century. The reason for this was that all these early inquiries lacked the most fundamental tool in order for microbiology and bacteriology to exist as a science, and that was the microscope.
Discovery
Anton van Leeuwenhoek was the first person to observe microorganisms, using a microscope of his own design, thereby making him the first microbiologist. In doing so Leeuwenhoek would make one of the most important contributions to biology and open up the fields of microbiology and bacteriology. Prior to Leeuwenhoek's discovery of microorganisms in 1675, it had been a mystery as to why grapes could be turned into wine, milk into cheese, or why food would spoil. Leeuwenhoek did not make the connection between these processes and microorganisms, but using a microscope, he did establish that there were forms of life that were not visible to the naked eye.Leeuwenhoek's discovery, along with subsequent observations by Lazzaro Spallanzani and Louis Pasteur, ended the long-held belief that life spontaneously appeared from non-living substances ring the process of spoilage.
Lazzarro Spallanzani found that microorganisms could only settle in a broth if the broth was exposed to the air. He also found that boiling the broth would sterilise it and kill the microorganisms. Louis Pasteur expanded upon Spallanzani's findings by exposing boiled broths to the air, in vessels that contained a filter to prevent all particles from passing through to the growth medium, and also in vessels with no filter at all, with air being admitted via a curved tube that would not allow st particles to come in contact with the broth. By boiling the broth beforehand, Pasteur ensured that no microorganisms survived within the broths at the beginning of his experiment. Nothing grew in the broths in the course of Pasteur's experiment. This meant that the living organisms that grew in such broths came from outside, as spores on st, rather than spontaneously generated within the broth. Thus, Pasteur dealt the death blow to the theory of spontaneous generation and supported germ theory.
In 1876, Robert Koch established that microbes can cause disease. He did this by finding that the blood of cattle who were infected with anthrax always had large numbers of Bacillus anthracis. Koch also found that he could transmit anthrax from one animal to another by taking a small sample of blood from the infected animal and injecting it into a healthy one, causing the healthy animal to become sick. He also found that he could grow the bacteria in a nutrient broth, inject it into a healthy animal, and cause illness. Based upon these experiments, he devised criteria for establishing a causal link between a microbe and a disease in what are now known as Koch's postulates.Though these postulates cannot be applied in all cases, they do retain historical importance in the development of scientific thought and can still be used today.
Classification and structure
Microorganisms can be found almost anywhere in the taxonomic organization of life on the planet. Bacteria and archaea are almost always microscopic, while a number of eukaryotes are also microscopic, including most protists, some fungi, as well as some animals and plants. Viruses are generally regarded as not living and therefore are not microbes, although the field of microbiology also encompasses the study of viruses.
[edit] Prokaryotes
Prokaryotes are organisms that lack a cell nucleus and the other organelles found in eukaryotes. Prokaryotes are almost always unicellular, although some species such as myxobacteria can aggregate into complex structures as part of their life cycle. These organisms are divided into two groups, the archaea and the bacteria.
Bacteria
Bacteria are the most diverse and abundant group of organisms on Earth. Bacteria inhabit practically all environments where some liquid water is available and the temperature is below +140 °C. They are found in sea water, soil, air, animals' gastrointestinal tracts, hot springs and even deep beneath the Earth's crust in rocks.[20] Practically all surfaces which have not been specially sterilized are covered in bacteria. The number of bacteria in the world is estimated to be around five million trillion trillion, or 5 × 1030.
Bacteria are practically all invisible to the naked eye, with a few extremely rare exceptions, such as Thiomargarita namibiensis.They are unicellular organisms and lack membrane-bound organelles. Their genome is usually a single loop of DNA, although they can also harbor small pieces of DNA called plasmids. These plasmids can be transferred between cells through bacterial conjugation. Bacteria are surrounded by a cell wall, which provides strength and rigidity to their cells. They reproce by binary fission or sometimes by budding, but do not undergo sexual reproction. Some species form extraordinarily resilient spores, but for bacteria this is a mechanism for survival, not reproction. Under optimal conditions bacteria can grow extremely rapidly and can double as quickly as every 10 minutes......
微生物是指一切肉眼看不到或看不清楚,因而需要借助显微镜观察的微小生物。微生物包括原核微生物(如细菌)、真核微生物(如真菌、藻类和原虫)和无细胞生物(如病毒)三类。
主要特性
微生物最大的特点,不但在於体积微小,而且在结构上亦相当简单。由於微生物体积极之微小,故相对面积较大,物质吸收快,转化快。微生物在生长与繁殖上亦是很迅速的,而且适应性强。从寒冷的冰川到极酷热的温泉,从极高的山顶到极深的海底,微生物都能够生存。
由於微生物适应性强,又容易在较短时间内积聚非常多的个体(例如10^10个/毫升的数量级),因此容易筛选并分离到突变株。容易得到微生物突变株的性质,给人类利用与开发微生物带来广阔契机,但也是导致抗药性的内在原因。
微生物的代谢
微生物的代谢指微生物(细胞)内发生的全部化学反应。 微生物的代谢异常旺盛,这是由於微生物的表面积与体积比很大(约是同等重量的成年人的30万倍),使它们能够迅速与外界环境进行物质交换。
代谢产物 微生物在代谢过程中,会产生多种代谢产物。根据代谢产物与微生物生长繁殖的关系,可以分为初级代谢产物和次级代谢产物两类。 初级代谢产物是指微生物通过代谢活动产生的、自身生长和繁殖所必须的物质,如氨基酸、核苷酸、多糖、脂质、维生素等。在不同种类的微生物细胞中,初级代谢产物的种类基本相同。 次级代谢产物是指微生物生长到一定阶段才产生的化学结构十分复杂,对该微生物无明显生理功能,或并非是微生物生长和繁殖所必须的物质,如抗生素、毒素、激素、色素等。不同种类的微生物所产生的次级代谢产物不相同,它们可能积累在细胞内,也可能排到外环境中。
代谢的调节 微生物在长期的进化过程中,形成了一整套完善的代谢调节系统,以保证证代谢活动经济而高效地进行。微生物的代谢调节主要有两种方式:酶合成的调节和酶活性的调节。 另外人工控制微生物代谢的措施包括改变微生物遗传特徵,控制生产过程中的各种条件等。
主要分类
微生物主要分为以下几类:(参见生物分类总表)
原核微生物
细菌(Bacteria)
古菌(Archaea)
真核微生物
真菌(Fungi)
原生生物(protozoan)
藻类(algae)
无细胞生物
病毒(virus)
类病毒(virusoid)
拟病毒(viroid)
朊毒体(亦称朊病毒、蛋白质质感染性颗粒)(prion)
微生物在自然界的存在
微生物在自然界中广泛存在,数目巨大。下表为一些生态环境中微生物细胞数目的估计:
密度 全球总数
海水 108~109 L-1 约1029
海洋沉积物 109 g-1 约3×1029
动物消化道 1011 g-1 约1025
地表或海底下深处 102~108 约1030
原核生物共构成全球生物量的25~50%。
微生物的作用
微生物与人类的生产、生活和生存息息相关。有很多食品(如酱油、醋、味精、酒、酸奶、奶酪、蘑菇)、工业品(如皮革、纺织、石化)、药品(如抗生素、疫苗、维生素、生态农药)是依赖于微生物制造的;微生物在矿产探测与开采、废物处理(如水净化、沼气发酵)等各种领域中也发挥重要作用。微生物是自然界唯一认知的固氮者(如大豆根瘤菌)与动植物残体降解者(如纤维素的降解),同时位于常见生物链的首末两端,从而完成碳、氮、硫、磷等生物质在大循环中的衔接。若没有微生物,众多生物就失去必需的营养来源、植物的纤维质残体就无法分解而无限堆积,就没有自然界当前的繁荣与秩序或人类的产生与维续。
此外,微生物对地球上气候的变化也起着重要作用。许多微生物直接参与了温室气体的排放或者吸收,而也有很多微生物可以成为未来的生物燃料[1]。
微生物与人类健康
微生物与人类健康密切相关。多数微生物对人体是无害的。实际上,人体的外表面(如皮肤)和内表面(如肠道)生活着很多正常、有益的菌群。它们占据这些表面并产生天然的抗生素,抑制有害菌的着落与生长;它们也协助吸收或亲自制造一些人体必需的营养物质,如维生素和氨基酸。这些菌群的失调(如抗生素滥用)可以导致感染发生或营养缺失。然而另一方面,人类与动植物的疾病也有很多是由微生物引起,这些微生物叫做病原微生物(pathogenic microorganism)或病原(pathogen)。重要的人类致病微生物列于下表中。
主要的人类致病微生物 疾病名称 致病原 全球感染(携带者)人数 每年新发病例数 每年死亡人数
结核 结核分枝杆菌 ~20亿人(全球三分之一人口) 881万例 (2003 [1]) 175万人 (2003 [2])
艾滋病 人类免疫缺陷病毒 4200万人 550万例 310万人
痢疾 志贺氏菌、痢疾杆菌、大肠埃希氏杆菌等 27亿例 190万人
疟疾 疟原虫 3-5亿例 100万人
乙型肝炎 乙型肝炎病毒 1000-3000万例 100万人
麻疹 麻疹病毒 3000万例 90万人
登革热 登革病毒 2000万例 2万4千人
流感 流感病毒 几乎全部人口 300-500万例 25万人
黄热病 黄热病毒 20万例 3万人
其他经常听说的致病微生物还有:流行已经完全得到控制或消灭的天花病毒(引起天花)和脊髓灰质炎病毒(导致小儿麻痹症);引起炭疽病的炭疽杆菌;以及近年来显现的萨斯冠状病毒(引起严重急性呼吸道综合症,又名萨斯、也俗称非典型肺炎)和可能将在人类流行的禽流感。
对现代生物学研究与医学技术的贡献
现代生物学的若干基础性的重大发现与理论,是在研究微生物的过程中或以微生物为实验材料与工具取得的。这些理论包括:
证明DNA(脱氧核糖核酸)是遗传信息的载体(三大经典实验:肺炎球菌的转化实验、噬菌体实验、植物病毒的重组实验)
DNA的半保留复制方式(双螺旋的每一条子链分别、都是复制模板)
遗传密码子的解读(64个密码子各对应20种氨基酸及终止信号的哪一种)
基因的转录调节(operon, promoter, operator, repressor, activator的概念与调节方式)
信使RNA的翻译调节(terminator)
等等……(请添加)
现在,很多常用、通用的生物学研究技术依赖于微生物,比如:
分子克隆
重组蛋白在细菌或酵母中的表达
很多医学技术也依赖于微生物。比如:
以病毒为载体的基因治疗
㈧ 关于新冠肺炎的英语短文有什么
Dear Lihua,
I’m glad to receive your email.You asked me to share with you what I’m doing in the epidemic situation.Here are my experiences.
Since the outbreak of novel coronavirus pneumonia in Wuhan in December,2019,I have been staying at home.On the one hand,I pay close attention to the epidemic situation through watching CCTV news or surfing the Internet;on the other hand I insist on studying.
Not only do I read classics, but also I have online courses given by my teachers.Besides,I take exercise every day to keep healthy.Faced with the disaster,many people including doctors,nurses and scientists act bravely and spare no effort to fight against it.They are real heroes.
Thank you for your concern.I’m looking forward to your reply.
Yours,
Li Hua
参考词汇有:
疫情 :epidemic situation
新冠肺炎 :novel coronavirus pneumonia
㈨ 用英语写出预防冠状病毒的方法
(1) constantly wash hands
(2) Wear certified mask
(3) Don't go to place with many people.