按照正确方法对同一地区内的裸地、草地和茂密的灌丛测量湿度，三处湿度大小的关系应是 (     )

做曲线运动的物体，在其轨迹上某一点的加速度方向（   ）

2016年12月3日，“逸仙杯”中山国际马拉松赛圆满结束。比赛期间，中山市各志愿者团队不怕苦不怕累，微笑着将服务撒满每个角落。志愿者的行动告诉我们（    ）

There is a new park near Andy's home. It's fine today. Andy and his family are in the park now. On their left, there is a café. On the right, there is a big lake. There are many flowers and trees around the lake. There's a small hill behind the lake. Near the lake, there are two signs（标记）. One says, "Don't swim in the lake."But you can go boating on the lake. There is a beautiful garden in the middle of the park. There are green grass and beautiful flowers in it. There are some small shops between the lake and garden. The park is so nice. Andy and his family like it very much.