填空
4×0.05=____
0.6÷0.12=____
已知:如图,⊙O的半径为9,弦AB⊥半径OC于H,sin∠BOC=23,则AB的长度为( )
New year is coming, we should make resolutions________the beginning of the year.
在日常生活中,下列说法正确的是( )