题目内容

Listeria are

A. Gram-positive coccus
B. Gram-negative coccus
C. Gram-positive bacillus
D. Gram-negative bacillus

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Archaebacteria are not

A. Oldest organisms
B. Living in extreme conditions
C. “true”bacteria
D. Prokaryotic

Which of the following is/are a pyogenic coccus/cocci?

A. Streptococcus
B. Neisseria
C. Staphylococcus
D. All of these

The most severe streptococcal diseases are caused by

A. Group B streptococci
B. Group A streptococci
C. pneumococci
D. enterococci

Bacteria are not

A. Unicellular
B. Life
C. Prokaryotic
D. Eukaryotic