—What does Anna look like?
—__________.
A:She's kind
B:She's tall
C:She likes skating
—In the morning.
点M(3,-4)关于x轴的对称点的坐标是 ( )
如图所示,某同学用弹簧测力计拉着放在水平桌面上的木块匀速滑动,在木块前端离开桌面至一半移出桌面的过程中,弹簧测力计的示数____,木块对桌面的压力____,木块对桌面的压强____.(均选填“变大“、“变小”或“不变”)