The movement of a microorganism or cell in response to a chemical stimulus is termed _____.

‏微生物(Microorganism)是个体微小、 结构复杂的一类低等生物。‌‏‌

微生物(Microorganism)是个体微小、 结构复杂的一类低等生物。 A: 正确 B: 错误

中国大学MOOC: 微生物(Microorganism)是个体微小、 结构复杂的一类低等生物。

Which of the following is the most important element of Koch’s germ theory of disease? The animal shows disease symptoms when ( ) A: the animal has been in contact with a sick animal. B: the animal has a lowered resistance. C: a microorganism is observed in the animal. D: a microorganism is inoculated into the animal.

Which is the most common microorganism in Acute uncomplicated cystitis? () A: Escherichia coli B: Proteus C: Klebsiella D: Pseudomonas E: Enterobacter

正常菌群（）。 A: B: prokAryotEmiCroorgAnism C: D: miCroorgAnism E: F: normAlflorA G: H: BACtErium I: J: ConDitionEDpAthEgEn

Which of the following is common microorganism causing Sub-acute Infective endocarditis ()?() A: staphylococcus B: streptococcus C: enterococci D: gram-negative bacteria E: fungus

Which of the following is common microorganism causing Sub-acute Infective endocarditis ()? () A: staphylococcus B: streptococcus C: tubercle bacillus D: gram-negative bacteria E: fungus

微生物（microorganism）形体微小、结构简单、肉眼看不见，必须借助光学显微镜或电子显微镜才能看清，微生物大小一般约（ ）。