All of the following statements concerning endotoxins of gram-negative bacteria are true EXCEPT that ( )
A. they differ markedly in their toxicity according to their specific bacterial origins
B. they are found in the blood of patients suffering from endotoxic shock
C. they consist mainly of lipopolysaccharide complexes
D. they induce the release of endogenous pyrogens from leukocytes
E. they are found only in gram-negative bacteria
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Which of the following statements is true?
A. Endotoxins produce varied effects such as neurotoxic or protein inhibition effects, but exotoxins produced generalized irritation and inflammation of epithelial surfaces
B. Endotoxins are found attached to the cell wall of certain bacteria, but exotoxins are secreted toxins that may exhibit their effect independently of the presence of the bacteria
C. Endotoxins include the neurotoxins of botulism and tetanus, while exotoxins include the enterotoxin of Staphylococcus aureus
D. More than one of the above statements is true
E. None of the above is true
The ability of a microbial species to cause disease is its ( )
A. pathogenicity
B. cuteness
C. mutation
D. infectious index
E. communicability
Which of the following is an endotoxin?
A. Cholera toxin
B. Diphtheria toxin
C. Plague toxin
D. LPS of salmonella
Enterotoxin
按账簿外表形式，现金日记账属于（）
A. 序时账簿
B. 分类账簿
C. 备查账簿
D. 订本式账簿
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