题目

You might have heard about identity theft: it’s what can happen when a thief gets enough of someone’s information to commit fraud(诈骗). Why should people care about it? Because recovering a stolen identity can be a time—consuming and expensive process. Imagine that someone pretends to be you: they use your name; they even convince businesses that they’re you and they open a credit card in your name, get a cell phone in your name, or buy things using a credit card that has your name on it. ID thieves can be creative about getting your information. There are some low—tech way把装有适量水的量筒倒置的烧杯里的水中，量筒口未接触烧杯底部，量筒中的水面高于烧杯中的水面，且水面是静止的，如图所示。将量筒缓慢向上提（量筒口未离开水面），则在这个过程中 A．量筒内、外水面的高度差保持不变          B．量筒内气体的压强逐渐变小 C．烧杯底内表面受到的压强逐渐变小          D．烧杯对桌面的压强逐渐变小