外科手术器械和罐头食品的消毒，都要以能够杀死什么为标准（　　）

A．螺旋菌

B．芽孢

C．球菌

D．具有荚膜的细菌

（）is the budgeted amount for the work actually completed on the schedule activity or WBS component during a given time period.

A.Planned value

B.Earned value

C.Actual cost

D.Cost variance