题目

College visits are important. Before you commit years of your life and money to a school, be sure you’re choosing a place that is a good match for your personality and interests. You can’t get the feel of a school from any guidebook, so be sure to visit the campus. Below are a few tips for getting the most out of your college visit. Explore on Your Own Of course you should take an official campus tour, but be sure to allow time to hang around on your own. The trained tour guides will show you a school’s selling points. But the oldest and prettiest buildings don’t give you the e 如图所示，小物体m与水平圆盘保持相对静止，随盘一起做匀速圆周运动，则物体的受力情况是（ ） A．受重力、支持力、静摩擦力和向心力的作用 B．摩擦力的方向始终指向圆心O C．重力和支持力是一对平衡力 D．摩擦力是使物体做匀速圆周运动的向心力