--- Do you like to visit a place____ history is very long.

A．that

B．which

C．who

D．whose

绝缘保护绳有（）两类。

A.人身绝缘保护绳；

B.两眼绝缘绳；

C.无极绝缘绳；

D.导线绝缘保护绳。