问题
选择题
The noodle house has service of all the restaurants in our town.[ ]
A. friendly
B. friendlier
C. friendliest
D. the friendliest
答案
答案：D
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The noodle house has service of all the restaurants in our town.[ ]
A. friendly
B. friendlier
C. friendliest
D. the friendliest
答案：D
。如果将小球从距离弹簧上端O点高度为H的地方由静止释放，小球自由落下，落到弹簧上端O点后，继续下落将弹簧压缩，求小球将弹簧上端压缩到A处时小球速度v的大小。