首页
登录
职称英语
Perhaps one of the best-known accidental discovery is Sir Alexander 【M1】____
Perhaps one of the best-known accidental discovery is Sir Alexander 【M1】____
游客
2023-10-13
81
管理
问题
Perhaps one of the best-known accidental discovery is Sir Alexander 【M1】______
Fleming’s discovery of penicillin. In 1922 Fleming accidentally discovered
an antibiotic that killed bacteria but not white blood cells . While suffering 【M2】______
from a cold, Fleming made a culture from some of his own nasal secretions.
As he examined the culture dish, filling with yellow bacteria, a tear fell from his 【M3】______
eye into the dish. The next day when he examined the culture, he found a clear
space which the tear had fallen. His keen observation and inquisitiveness led 【M4】______
him to the correct conclusion: the tear contained a substance that caused rapid
destruction of the bacteria, but was harmless to human tissue. The antibiotic
in the tear he named lysozyme. It turned to be of little practical importance, 【M5】______
because the germs that lysozyme killed were relatively harmless, and this discovery 【M6】______
was an essential prelude to this of penicillin, as we shall see. 【M7】______
In 1928, Fleming was doing a research on influenza. While carrying out some 【M8】______
routine laboratory work that involved microscopic examination of cultures of
bacteria growth in petri dishes(flat glass dishes with covers), Fleming notice in 【M9】______
one dish an unusual clear area. Examination showed that the clear area surrounded
a spot where a bit of mould had fallen onto the dish, which had been left
uncovered. Remembering his experience with lysozyme, Fleming concluded that
the mould was producing something that was dead to the Staphylococcus bacteria 【M10】______
in the culture dish. Fleming isolated the mould and identified it as belonging to
the genus Penicillium, and he named the antibiotic substance it produced penicillin. [br] 【M3】
选项
答案
filling--filled
解析
(此处两个逗号之间的内容修饰culture dish,fill“充满,装满”与之为被动关系,因此应当把filling改为filled。相当于定语从句which was filled with…)
转载请注明原文地址:https://tihaiku.com/zcyy/3094587.html
相关试题推荐
Whatisthenewdiscoveryabout?[originaltext]Otypebloodcanbetransfusedsa
Perhapsalmosteveryonehasanexperienceofhavingfeltletterafterli
Perhapsalmosteveryonehasanexperienceofhavingfeltletterafterli
Ifthisisa"Mandelamoment"forAmerica,therewere—perhapsinevitably—few
Ifthisisa"Mandelamoment"forAmerica,therewere—perhapsinevitably—few
Ifthisisa"Mandelamoment"forAmerica,therewere—perhapsinevitably—few
Ifthisisa"Mandelamoment"forAmerica,therewere—perhapsinevitably—few
Ifthisisa"Mandelamoment"forAmerica,therewere—perhapsinevitably—few
Whatisthenewdiscoveryabout?[br][originaltext]Otypebloodcanbetransfu
Whatisthenewdiscoveryabout?[br][originaltext]Otypebloodcanbetransfu
随机试题
_____canhelpbutadmitthatdrasticchangeshavetakenplaceinChinasincethe
Herecomesthee-bookrevolutionA)Atwhattemperaturedoelectronicbo
A------BikelaneB------DefaultlocationC------Startnavigation
A.(-1,1) B.[-1,1] C.[-1,1) D.(-1,1]
A.600 B.800 C.1000 D.1200
信用的表现形式包括()。A.商业信用 B.银行信用 C.国家信用 D.消费
1.运行中的并联电容器组电抗器室温度不应超过()℃ A3
优抚医院服务对象大多是因在部队服役期间遭遇突发伤残或者罹患重病导致“失能”的,回
抗原脱敏疗法治疗支气管哮喘的机制是A.舒张支气管(缓解支气管平滑肌痉挛) B.
A.牙源性颌骨囊肿 B.发育性囊肿 C.阻塞性囊肿 D.牙源性肿瘤 E.
最新回复
(
0
)