He had lost his temper and his health in the war and never found________of them again.

A．neither　

B．either

C．each　

D．all

锅炉熄火，跳闸后吹扫完成后，一般在最初4～8h内，关闭锅炉各处门、孔和挡板，避免大量冷空气进入；（）h后，如要加强冷却可开引风机通风，也可适当增加上水和放水次数，以加快冷却。