Tom had made up his mind to give it up, but on ____ second thought he determined to have ____ third try.

A．a ; a

B．不填 ; a

C．不填; 不填

D．the ; a

对传染病人或疑似传染病人污染的场所和物品，医疗机构应当及时采取（）

A.封闭场所并销毁物品

B.强制隔离治疗

C.必要的卫生处理

D.报告上级卫生行政机关处理

E.提请卫生防疫部门处理