求与双曲线x29-y216=1有共同渐近线，并且经过点（-3，23）的双曲线方程

某教室有8盏额定功率为40W的日光灯，平均每天正常工作4h，一天消耗的电能为______kW•h．

中性

The policeman asked me ______ and ______ .

A．what was the matter; what was my name

B．what was the matter; what my name was

C．what the matter was; what was my name

D．what the matter was; what my name was

简述接头连接原则。