其结果可判定为弱阳性者为：
A．水痘B．传染性软疣C．扁平疣D．天疱疮E．带状疱疹
参考答案：B
I hear____ boys in your school like playing football in their spare time,though others prefer basketball.
A．quite a few
B．quite a lot
C．quite a bit
D．quite a little
一般以信噪比为多少时相应的浓度或注入仪器的量来确定定量限
A．2:1
B．10:1
C．5:1
D．3:1
E．8:1
