One of the requirements for a fire is that the material ____ to its burning temperature.

A．is heated

B．be heated

C．would be heated

D．do heat

切断传播途径的方法不包括（）

A.保持良好的通风

B.教育病人与健康人谈话时戴口罩

C.建立传染源与易感人群间的屏障

D.实施涂阳肺结核病人与易感者的隔离措施

E.病人的居室应有较小的窗户