根据句意补全单词。 1. Look! Mum is c____________e
题型：填空题
问题：
根据句意补全单词。
1. Look! Mum is c____________ eggs on the stove.
2. This is the refrigerator. It's c____________ inside.
3. The green toothbrush is mine. The red toothbrush is y____________.
4. My hands are dirty. But your hands are c____________.
5. Today is Sunday. Tomorrow is M____________.
的长木板静止在光滑的水平面上，并与半径为
的
光滑圆弧形固定轨道接触（但不粘连），木板的右端到竖直墙的距离为
；另一质量为2
。试求
与
应满足什么条件