Some sea water came into the wheel house during the voyage due to（）the window thereof.

A.shorten the scope of anchor cable
B.increase the scope of anchor cable
C.put over the sea anchor
D.put over a stern anchor

A.increases the size of foam bubbles formed
B.increases the rate of foam production
C.improves the extinguishing properties of foam
D.gives the nozzleman more freedom of movement，since it can be placed anywhere in the hose line

A.four-stranded sisal line
B.three-stranded cotton line
C.sail twine
D.two-stranded hemp cord