灭菌物品灭菌效果监测正确的是（）

A.不得检出致病性微生物

B.不得检出病原微生物

C.不得检出非病原微生物

D.不得检出任何细菌

E.不得检出任何微生物

English schoolboys often show the sense of sportsmanship to a______high degree in their relations with each other.

A．precisely
B．surprisingly
C．clearly
D．essentially