问题

监测末梢血象WBC需终止化疗的标准是

A:WBC低于6乘以十的九次方/L
B:WBC低于5乘以十的九次方/L
C:WBC低于4乘以十的九次方/L
D:WBC低于3乘以十的九次方/L E.WBC低于2乘以十的九次方/L
正确答案是: