凡是从事无损检测专业的人员，均需按GB9445-88标准进行技术资格鉴定。（）
参考答案：错
在国际单位制中，力的单位是___________，长度的单位是_________，质量的单位是__________。
A．(A) When we are attending an English language course.
B．(B) When we are watching an interesting TV program.
C．(C) When we are enjoying the murmuring of a brook.
D．(D) When we are listening for a friend’s voice in a crowd.
