A differential medium is one in which A: Fungi and viruses grow differently. B: Two different bacteria can be distinguished. C: A particular nutrient is used differently by two different bacteria. D: Two different temperatures are utilized in the incubation period.

____ is a typical photolithoautotroph. A: Sulfur oxidizing bacteria B: Iron oxidizing bacteria C: Cyanobacteria D: Purple non-sulfur bacteria

Gelatin medium is used to identify intestinal bacteria.

”革兰氏阳性菌” A: Gram-positive bacteria B: Gram-negative bacteria C: Gram-negative virus

Gelatin medium is used to identify intestinal bacteria. A: 正确 B: 错误

Gram-positive bacteria can be differentiated from Gram-negative bacteria since the peptidoglycan layer comprises 10% of the cell wall

The main purpose of semi-solid medium is (). A: Check the motility of bacteria B: Check the ability of bacteria to metabolize glucose to produce acid and gas C: Check the ability of bacteria to metabolize tryptophan to produce indole D: None of the above

Which is the most common bacteria in aspiration pneumonia? () A: staphylococcus B: anaerobic bacteria C: streptococcus pneumonia D: pseudomonas aeruginosa E: fungus

3-2。What factors do affect the amount of the bacteria grows in packaged food？（ ） A: The type of the packaged food B: Temperature and time C: The structure of bacteria

Exactly which bacteria cause the ______ is still unknown.