题目

Tips for cooking on a Tight Schedule From my experience, there are three main reasons why people don’t cook more often: ability, money and time.    11  . Money is a topic I’ll save for another day. So today I want to give you some wisdom about how to make the most of the time you spend in the kitchen. Here are three tips for great cooking on a tight schedule: 1. Think ahead. The moments when I think cooking is a pain are when I’m already hungry and there is nothing ready to eat. So think ahead of the coming week. When will you have time to cook? Do you have the right materi13．如图所示，甲是不带电的绝缘物块，乙是带正电的物块，甲、乙叠放在一起，置于粗糙的绝缘水平地板上，地板上方空间有垂直纸面向里的匀强磁场，现加一水平向左的匀强电场，发现甲、乙无相对滑动一起向左加速运动．在加速运动阶段（　　）A．甲、乙两物块间的摩擦力不变B．乙物块与地而之间的摩擦力不断增大C．甲、乙两物块一起做加速度减小的加速运动D．甲、乙两物体可能做匀加速直线运动