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
66
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] 【M10】
选项
答案
dead—deadly
解析
(根据上下文可知,此处指“这种霉菌会产生一种对葡萄球细菌来说致命的物质”,因此应当把dead“死亡的,去世的”改为deadly“致命的;极具破坏性的”。)
转载请注明原文地址:http://tihaiku.com/zcyy/3094594.html
相关试题推荐
Perhapsalmosteveryonehasanexperienceofhavingfeltletterafterli
Perhapsalmosteveryonehasanexperienceofhavingfeltletterafterli
Youaretryingtofillabathwithbothtapson,buthaveaccidentallyleftout
Ifthisisa"Mandelamoment"forAmerica,therewere—perhapsinevitably—few
Ifthisisa"Mandelamoment"forAmerica,therewere—perhapsinevitably—few
Ifthisisa"Mandelamoment"forAmerica,therewere—perhapsinevitably—few
Ifthisisa"Mandelamoment"forAmerica,therewere—perhapsinevitably—few
Youaretryingtofillabathwithbothtapson,buthaveaccidentallyleftout
Whatisthenewdiscoveryabout?[br][originaltext]Otypebloodcanbetransfu
Whatisthenewdiscoveryabout?[br][originaltext]Otypebloodcanbetransfu
随机试题
[audioFiles]audio_eusm_0222(20106)[/audioFiles]A、Gettingrichquickly.B、Distin
简述高等学校科研应遵循的原则。
关于多层砌体房屋纵横向砌体抗震墙布置的规定,下列哪一项是错误的?()A.宜均
对公路水运检测机构进行现场核查,专家组要依据现场核查情况,填写《公路水运工程试验
我国《上市公司收购管理办法》规定,通过证券交易所的证券交易,收购人持有—个上市公
【病例摘要】 患者,男,57岁。 近10天来右胁胀痛,口干口苦,寐少梦多。今
A.背甲及腹甲B.胆结石C.干燥分泌物D.干燥体E.未骨化的密生绒毛的幼角龟甲的
下列不属于A型药物不良反应的是A.副作用 B.后遗效应 C.过敏反应 D.
我国倡导启发式教学的第一个人是古代教育家( )A.孔丘 B.老子 C.董仲
易于形成脓肿的致病菌是 A.金黄葡萄球菌B.溶血性链球菌C.厌氧菌D.真
最新回复
(
0
)