有了保护接地，通过人体的电流被保护接地回路分流，从而减少了人体触电的危害。（）
参考答案：对
Dina, ______ for months to find a job as a waitress, finally took a position at a local advertising agency.
A. struggling B struggled C. having struggled D. to struggle
用阴阳相互转化说明的是（）
A.寒极生热，热极生寒
B.孤阴不生，独阳不长
C.阴盛则阳病
D.阳盛则阴病
E.阴虚则热
