进入作业现场应正确佩戴（），现场作业人员应穿全棉长袖工作服、绝缘鞋。
A.岗位标识
B.上岗证
C.工作牌
D.安全帽
参考答案：D
More and more people have got to know the importance of the English study. ______, about six people in ten in this city are able to speak a little English.
A．Believe it or not
B．In other words
C．Besides
D．However
可以用阴阳互根解释的是（）
A.热极似寒、寒极似热
B.寒极生热，热极生寒
C.阴胜则寒、阳胜则热
D.阴虚则热、阳虚则寒
E.阴损及阳、阳损及阴
