多长时间尿细菌培养阴性，可报告无细菌生长
A．12h
B．18h
C．24h
D．36h
E．48h
参考答案：E
解析：尿细菌阴性是指48h无细菌生长。
根据句意和首字母填空。
1. That thing made me p______.
2. Georgia, you are a u______ person.
3. I think my little sister has special t______.
4. We all chose Li Hua as our l______.
5. Have you w______ anything, Tom ?
6. They have a______ watched the match.
（）
A.A
B.B
C.C
D.D
（）