储蓄随利率____而降低的现象称为利率对储蓄的____。（）

A.提高；替代效应

B.降低；替代效应

C.提高；收入效应

D.降低；收入效应

Which statement pertaining to log keeping is TRUE?（）

A.Entries relating to pre-voyage，pre-departure and daily tests are required

B.Both A and C

C.All distress，urgent and safety communications must be logged

D.Routine daily MF-HF and INMARSAT-C transmissions do not have to be logged