. The school of the future will probably be quite different from_____they are today.

A．that

B．what

C．which

D．ones

船体中横剖面是指（）

A.中站面与船体相截所得的剖面

B.中线面与船体相截所得的截面

C.水线面与船体相截所得的截面

D.船体最大的横截面