⑴ ____ A. go home late.
⑵ ____ B. do housework.
⑶ ____ C. read in bed.
⑷ ____ D. draw a picture.
关于安全用电,下列说法中正确的是( )
若 |a+6|=0 ,则a=____;若 |a|=-a ,则a____0.