用何种方式来判断疗效

A．痰菌转阴

B．血沉正常

C．胸片病灶消失

D．结核菌素试验阴性

E．体温正常

An ecosystem consists of the living and nonliving things in an area ________ interact with one another.

A．that

B．where

C．who

D．what