帝王世代沿袭的王位世袭制在中国延续了近四千年,父子相传、兄终弟及……对中国社会影响深远。这种制度开始于（     ）

观察下列各式：

1³=1²

1³+2³=3²

1³+2³+3³=6²

1³+2³+3³+4³=10²

…

猜想1³+2³+3³+…+10³=____．

Peter: Let's play computer games!
Barry: That sounds interesting, but I don't have a computer.
Peter: Well, do you have a volleyball?
Barry: Yes.
Peter: Then let's play volleyball.
Barry: Oh, volleyball is so difficult.
Peter: OK, let's watch TV.
Barry: That sounds boring. Hmmm, let's play soccer! Do you have a soccer ball?
Peter: No, I don't.
Barry: Oh, well, do you have a basketball?
Peter: Yes, I do. Let's play basketball!
Barry: That sounds fun!