下列使用酒精灯操作错误的是（ ）
A．用漏斗向酒精灯里添加酒精
B．实验完毕用嘴吹灭酒精灯
C．使用外焰加热
D．酒精灯打翻起火，用湿抹布扑灭
答案：B
下列关于疏散楼梯间的说法正确的是（）。
A．楼梯间内可以设置卷帘
B．公共建筑的楼梯间内可以敷设或穿越可燃气体管道
C．建筑中的疏散楼梯间在各层的平面位置可以改变
D．疏散用楼梯和疏散通道上的阶梯不宜采用螺旋楼梯和扇形踏步
--The weather has been very hot and dry.
--Yes. If it had rained even a drop, things would be much better now! And my vegetables .
A．wouldn't die
B．didn't die
C．hadn't died
D．wouldn't have died
