父母都工作的家庭叫做（）家庭。
参考答案：双职
食品冷藏64天，细菌灭括率为（）
A．70%
B．75%
C．89%
D．96%
E．98%
Don't talk to Danny like that. He is only ______ eleven-year-old boy. [ ]
A. a
B. an
C. the
D. 不填
