A:Determined; remained
B:Determined; remaining
C:Determining; remaining
D:Determining; remained
多项式6ab2c﹣3a2bc+12a2b2的公因式是( )
当12点时,钟面上时针和分针组成的角是____角;
当6点时,钟面上时针和分针组成的角是____角;
当5点30分时,钟面上时针和分针组成的角是____角.