用电器上所标的电功率的大小指的是[ ]
A．用电的多少
B．额定功率的大小
C．消耗电能的多少
D．实际功率的大小
答案：B
下列情况中没有细菌、真菌的是 [ ]
A．刚用酒精灯灼烧过的解剖针
B．用消毒液消过毒的地面
C．刚用肥皂洗过的手
D．刚用洗洁精洗过的碗筷
I had promised to send him an email_______ I got home but I was so busy that I forgot to do so .
A．while
B．until
C．the moment
D．ever since
