预防术后肺部并发症，应除外哪项（）
A.病人戒烟
B.训练卧床排尿
C.治愈急性呼吸道炎症
D.注意口腔卫生
E.鼓励慢性呼吸道炎症患者排痰
参考答案：B
Tom insisted that what he said _____ true, and insisted that he _____ punished.
A．be; should not be
B．was; not be
C．was; was not
D．should be; not be
为什么要将白云石热分解后再结晶制作耐火材料？
