Air temperature varies with（）.

A.serves as a sea painter
B.detaches automatically
C.is used to rig the boarding ladder
D.is cut immediately as it is of no further use

A.colder sea surface
B.warmer sea surface
C.dry coastal plains
D.high mountain or plateau

A.a heavy anchor with an extra long line used to anchor in deep water
B.a cone shaped bag used to slow down the wind drift effect
C.a pad eye to which the sea painter is made fast
D.made of wood if it is of an approved type