— There is milk in the fridge. Please buy some on your way home.
— All right.
A:much
B:many
C:little
D:few
- ____ - Yes.
水平桌面上放一本书,书的质量为300g,与桌面的接触面积为5×10﹣2m2,则书所受的重力为 ____N,书对桌面的压强为 ____Pa.g=10N/kg
光产生明显衍射的条件:障碍物或孔的尺寸比____小或跟____差不多.
多项式3x2﹣2xy3﹣12y﹣1是( )