100级洁净度标准中对微生物的要求是

A．浮游菌/m³≤1

B．浮游菌/m³≤3

C．浮游菌/m³≤5

D．浮游菌/m³≤10

E．浮游菌/m³≤15

The question       we should call in a specialist now was raised by the family doctor.

A．which

B．who

C．whether

D．when