目前细菌检查最重要的确诊手段（）
A.抗原检测
B.细菌培养
C.细菌遗传物质检测
D.抗体检测
E.直接涂片镜检
参考答案：B
5个9连加的和是多少？
The seaside beach turned out to be very beautiful, was more than the tourists had expected. [ ]
A. what
B. that
C. which
D. where
