家长的特殊素质指的是？

TAT是一种（）

A.死疫苗

B.活疫苗

C.类毒素

D.抗毒素

E.丙种球蛋白

There _____ great changes in our hometown in the past fifteen years. [ ]

A. has been

B. have been

C. was

D. were

下列各地中属于沿海省区省会城市的是[ ]

A．合肥

B．青岛

C．汕头

D．福州

下列工具酶中不以NAD(P)H为辅酶的是

A．LDH

B．MDH

C．G6PD

D．POD

E．GLDH

病毒复制活跃的标志是

A．HBsAg
B．抗-HBs
C．HBcAg
D．抗-HBeAg
E．抗-HBc