Which sentence is wrong?

A．The professor lives in the room whose windows face south.

B．Don’t enter the house its roof has been destroyed in the hurricane.(飓风)

C．We prefer the students who like challenging themselves.

D．I still remember the name of the village we visited last year.

机房工程架空地板工程中，取一端点接至接地铜板采取单一回路接地，接地电阻不应大于（）？

A.10欧姆

B.5欧姆

C.3欧姆

D.1欧姆