锅炉熄火后，一般通风几分钟后再停止送风机、引风机？
参考答案：
5～10分钟
Frank ______ London by train which ________ at 8:30 next morning.
A．is leaving for; will leave
B．are leaving for; leaves
C．is leaving for; leaves
D．will leave for; will leave
解毒药与适用证
急性阿片类中毒(表现为中枢和呼吸抑制)及急性酒精中毒
A．乙酰胺B．氟马西尼C．纳洛酮D．亚硝酸钠E．依地酸钙钠
