All Bacillus species are known as
A. endospore formers
B. obligate anaerobes
C. obligate aerobes
D. both a and b
E. both a and c
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Which of the following bacteria produce endospores?
A. Salmonella
Bacillus anthracis
C. Staphylococcus aureus
D. Streptococcus pyogenes
E.coli
Plague is caused by
A. Yersinia pestis
B. Yersinia enterocolitica
C. Yersinia pseudotuberculosis
D. cereus
E. B.anthracis
Transmission of Yersinia pestis (bubonic form) is by
A. ticks
B. fleas
C. lice
D. mosquito
E. mites
瞬心的数量N=n(n -1)/2中,构件的数量n不包括机架在内。
A. 对
B. 错