非孕妇尿中HCG的浓度A.<2.0ng£¯LB.<2.5ng£¯LC.<3.0ng£¯LD.<3.5ng£¯LE.<4.0ng£¯L

非孕妇尿中HCG的浓度

A．<2.0ng/L

B．<2.5ng/L

C．<3.0ng/L

D．<3.5ng/L

E．<4.0ng/L