A: 12,0
B:14,0
C:18,0
D:(1,0)
一个物体在空气中用弹簧测力计称得重3N,将其全部浸没在水中用弹簧测力计称,示数为2N,则该物体的体积为 ____ ,密度为 ____ 。
Could you please____ ____the window?
We all know that it is very important for us to learn ____ (口语的) English.