对败血症有确诊依据的是（）。

A.血常规

B.中毒症状

C.血培养

D.尿常规

E.血浆白蛋白测定

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