工程建设部在开展工作过程中，对（）单位发出邀请函。
A.监理单位
B.设计单位
C.分包单位
D.施工单位
参考答案：A, B, D
It was the truth that the black reached a stage_______ they had almost no rights at all in the past.
A．when
B．where
C．which
D．that
简述“5S”的内在联系。
