---Ken, ____, but your TV is going too loud.

A．I’d like to talk with you

B．I’m really tired of this

C．I hate to say this

D．I need your help

一氧化碳的生物监测指标是（）

A.血铅

B.尿铅

C.尿镉

D.血中血红蛋白

E.血中碳氧血红蛋白