题目

It is important to introduce yourself in a creative, memorable way to distinguish yourself from the crowd.    56   . Since being witty(言辞诙谐的) doesn’t always come easily, try one of these creative introductions and separate yourself from the rest. Write your first or last name on a piece of paper.    57   . So if your name is Tom, you might say you are tireless, optimistic and mild.    58   . Then say that you will do so in the words of your“best and worst critic”— your mother. By breaking the ice in this way, you can go on in either a humorous or serious 若x1，x2，x3，…，xn的方差为3，则2x1，2x2，2x3，…，2xn的方差为1212．