Plastic pipes will be used instead of metal pipes.
A.Metal pipes will be used.
B.Plastic pipes will be used.
C.Either plastic pipe or metal pipe will be used.
D.Plastic pipes are better than metal pipes.
正确答案是B
Plastic pipes will be used instead of metal pipes.
A.Metal pipes will be used.
B.Plastic pipes will be used.
C.Either plastic pipe or metal pipe will be used.
D.Plastic pipes are better than metal pipes.
正确答案是B