如图所示，物体沿斜面匀速下滑，在这个过程中物体所具有的动能________，重力势能_________（填“增加”、“不变”或“减少”）
Chinese clay art is famous because the clay pieces are so small but they look very （真实的）
Each different part of China has its own special forms of （传统的）art．
Sandy went into her sister's room without k on the door．That made her sister mad．
That British teacher is very h ．He always tells us interesting jokes．
Young children are taught road safety to a road accidents．
粤公网安备 44130202000953号