题目

Where is the Blue Ocean Restaurant?A.Beside the Blue Sky Restaurant.B.Opposite the Blue Sky Restaurant.C.Opposite the Blue Bay Restaurant. 答案：【答案】C【解析】【原文】W: Where are you going for your birthday tomorrow?M: I have booked a room in the Blue Bay Restaurant.W: You mean the Blue Sky Restaurant?M: No, that’s the Blue Bay. Just across from the Blue Ocean Restaurant.在固定于地面的斜面上垂直安放了一个挡板，截面为 圆的柱状物体甲放在斜面上，半径与甲相等的光滑圆球乙被夹在甲与挡板之间，没有与斜面接触而处于静止状态，如图所示。现在从球心O1处对甲施加一平行于斜面向下的力F，使甲沿斜面方向极其缓慢地移动，直至甲与挡板接触为止。设乙对挡板的压力F1，甲对斜面的压力为F2，在此过 1.3.5