The Master or person in charge of a ship shall insure that each deck from which lifeboats are launched is（）.

A.surfaced with a nonskid texture

B.roped off to prevent unnecessary access

C.kept clear of any obstructions that would interfere with launching

D.posted with a list of persons assigned to the lifeboat

关于开销户登记簿的查询打印，下列说法错误的是（）

A、3级以上（含3级）柜员授权

B、本交易支持缺省查询

C、只可查询本机构和下级机构的开销户、卡

D、机构号码为必输项