功能性电刺激属于（）
A.直流电
B.低频电
C.中频电
D.高频电
E.微波疗法
参考答案：B
开发商获得土地使用权以前即可进行招标。
The disinfection of various compartments in a vessel by filling with a gaseous agent to destroy rats and all insects pests which act as germ carriers means（）.
A.displacement
B.fumigation
C.discharging
D.compensation
