安装照明线路时，开关和插座离地一般不低于（）m。
A.1m
B.1.3m
C.1.2m
D.1.1m
参考答案：B
— Why? Tom, your shirt is so dirty!
— Mum, I ＿＿ my storeroom downstairs。
A．cleaned
B．have worked
C．was cleaning
D．have been cleaning
简述借款人自主支付有权签批人制度和AB角制度的内容？
