关于煮沸消毒法的叙述中，哪项是错误的（）

A.对于肝炎患者污染的器械，应煮沸30min

B.消毒时间应自器械浸入开始计算，一般需15~20min

C.适用于耐热、耐温物品

D.可损伤刀刃的锋利性

E.加入2%碳酸氢钠可缩短消毒时间，并可防锈

When in command of a lifeboat under oars，the command TOSS OARS means to（）.

A.lift oars to vertical position，trim blades fore and aft with handles resting on the thwarts

B.complete the stroke，come to Oars，raise the oars smartly to the vertical，rest handles on footings and trim blades fore and aft

C.place oars in row locks directly from the boated position or from Stand by oars position

D.complete the stroke (when rowing in ahead motion)，raise the oars with crook of elbow to about 30 degrees，swing blades forward