Which test of the following is used for confirming the diagnosis of HIV infection（）
A. Enzyme-linked immunosorbent assay （ELISA）
B. Radioimmunoassay
C. Indirect immunofluorescence test
D. Western blotting
E. Complement fixation test
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Which of the following methods cannot inactivate HIV（）
A. 75% ethanol
B. Ultraviolet light
C. Iodine tincture
D. Sodium hypochlorite
E. Heating under 100℃ for 20 minutes
Which of the following is incorrect about the characteristics of HIV（）
A. Retrovirus
B. Single-stranded DNA virus
C. Lentivirus
D. Include HIV-1 and HIV-2
E. Consists of envelope and core
74LS160的计数条件是（）
A. ET=0
B. EP=0
C. B．ET=0
D. EP=1
E. C．ET=1
F. EP=0
G. D．ET=1
H. EP=1
Which
of the following methods provides the most accurate results in cost estimation（）Which
of the following methods provides the most accurate results in cost estimation（）
A. Least-squares regression method
B. High-low method
C. Scatter-graph method
D. Account Analysis method
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