金属氢化物是负氢离子【亲核试剂】给予体,它们可还原羰基,一般不还原碳碳双、叁键。
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Virulence factors of Mycobacterium tuberculosis do not include
A. intracellular survival
B. exotoxin
C. cord factor
D. cell wall component
Mycobacterium tuberculosis and related species
A. are obligate anaerobes
B. are acid-fast bacilli
C. only found in humans
D. will be visible only if incubated up to 2~4 weeks
The most common way in which tuberculosis is acquired is via the
A. skin
B. gastrointestinal tract
C. respiratory tract
D. genital tract
Mycobacterium tuberculosis can be found in the sputum of patients with tuberculosis. After digestion of the sputum, isolation is the best accomplished using
A. Sheep blood agar
B. Thiosulfate citrate bile salt sucrose medium
C. Lowenstein-Jensen medium
D. Maconkey Agar