下列指标中不属于数值变量的是（）

A.红细胞计数

B.男婴呼吸频率

C.脉搏数

D.男婴出生比例

E.血压

During a fire drill on a ship，what action is required?（）

A.Start each fire pump

B.Launch and run a lifeboat

C.Inventory rescue and fire equipment

D.Inspect fire hoses