A:y=x-12
B:y=x-12-2
C:y=x+12+1
D:y=x+12-2
We find______impossible to get there before 8 o’clock.
The workers are busy _______ windows to the new building these days.
一个几何体的三视图如图所示,其中正视图是一个正三角形,则这个几何体的体积为( )
等质量的SO2和CO2中所含氧元素的质量比是( )