题目

小明撑一雨伞站在水平地面上，伞面边缘点所围圆形的半径为R，现将雨伞绕竖直伞杆以角速度ω匀速旋转，伞边缘上的水滴落到地面，落点形成一半径为r的圆形，当地重力加速度的大小为g，根据以上数据可推知伞边缘距地面的高度应为_________ 答案： 用所给单词的适当形式填空。1. There is some ______ (orange) in the bottle. 2. I want some ______ (tomato) for dinner. 3. Would you like some ______(salad)? 4. How ______ (much) eggs do you have? 5. Let’s have ______ (broccoli). It’s good for your health.