专业技术人员对自己专业角色的认同是专业发展的基础和前提。()
参考答案:对
He ___goes to see his grandparents and stays with them for_____.
A.sometime, some time
B.some times, sometime
C.sometimes, sometime
D.sometimes, some time
电流继电器动作电流整定是通过改变()来调整的。