属于企业员工的良师益友，充当前沿指挥官角色的是（）。
A.高层领导者
B.中层领导者
C.基层领导者
D.中高层领导
参考答案：C
The new spokesperson of China’s Foreign Ministry, Ms Hua Chunying is reported _______ in Jiangsu Huaizhou High School.
A．to study
B．to have studied
C．to have been studied
D．to be studying
游标卡尺的怎样正确使用？
