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【判断题】
三相对称负载联成Y时，计算电路参数，仅只要计算其中一相，即可推出其余相。A.
正确
B.
错误
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举一反三
【单选题】Bacterial pili are involved in ( )
A.
Adherence to host cells
B.
Motility.
C.
Resistance to heat.
D.
Resistance to phagocytosis.
E.
Endotoxic activity.
【简答题】地方政府发展初期主要是以____竞争作为主要形式。
【单选题】Transformation is important in bacterial pathogenicity because
A.
it allows uptake of DNA that can homologously recombine into the bacterial chromosome and change virulence characteristics
B.
it kills recipient cells and prevents future cell invasion
C.
it enhances site-specific recombination that turns on virulence factor genes
D.
it causes transpositions to occur at high frequency that can kill virulent bacteria
E.
none of the above
【单选题】Which of the following statements about bacterial meningitis is incorrect?
A.
The most likely causes of bacterial meningitis vary with patient age.
B.
Chronic bacterial meningitis is mainly caused by mycobacterium tuberculosis.
C.
Acute bacterial meningitis is a true medical emergency.
D.
Iatrogenic infection is the most common route of infection for bacterial meningitis.
【单选题】Which one is the direct examination of bacterial specimens from patients?
A.
Stains for microscopic examination,
B.
Extraction of bacterial DN
C.
cultivation of specimen
D.
Biochemical test,
【简答题】bacterial—
【判断题】The generation of bacterial spores is a manifestation of bacterial reproduction.
A.
正确
B.
错误
【单选题】As for the acute bacterial endophthalmitis,which of the following is not true( )
A.
Acute postoperative endophthalmitis is a catastrophic complication of intraocular surgery
B.
Acute bacterial endophthalmitis usually occurs within 7 days of operation
C.
Acute bacterial endophthalmitis is characterized by mild ocular pain, redness, lacrimation, photophobia and slight loss of vision
D.
I n metastatic forms and in cases with deep infections, vitreous cavity is filled with exudation and pus. Soon a yellowish white mass is seen through
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