（）.139.32.57.80为 类IP地址。
参考答案：B
There are _____ students in my school.[ ]
A. eight hundreds
B. eight hundred
C. eight hundreds of
D. eight hundred of
根据下列HBV感染状况检查结果，可作为献血员的是抗 HBc 抗Hbe 抗HBs HBsAg
A．+ - - +
B．- - + -
C．+ + - +
D．- - - +
E．+ + - -
