日本的国花是什么？
参考答案：樱花
It's 7 o'clock. My family ______ dinner at home. [ ]
A. is having
B. are having
C. has
D. have
带电作业工具房应配备湿度计、温度计、抽湿机（）工具摆放架等装备
A、加热器
B、电冰箱
C、灭火器
D、氧量仪
