温家宝总理指出，东北地区等老工业基地具有重要的战略地位，要把老工业基地的调整、改造和振兴摆到更加突出的位置，走出加快老工业基地振兴的路子。据有关知识，完成问题。

“观察DNA和RNA在细胞中的分布”实验中，下列操作正确的是（  ）

To______________ one's salary is to make the salary become twice as much as before.

请根据老师与同学们的对话，为衣物找到主人。
A: Is this your cap?
B: No, it's Mary's.
A: Is this your skirt, May?
B: No, it isn't. It's Lily's.
A: Is this your skirt, Lily?
C: Yes, it is.
A: Are these your gloves?
C: No, they aren't. They are Tom's.
A: Are these your shorts, Li Hai?
D: Yes, they are.
A: Whose scarf is this?
D: It's May's.
⑴Mary  ____                A.
⑵Lily  ____                 B.
⑶Tom  ____              C.
⑷Li Hai  ____               D.
⑸May  ____                E.

如图，等边△ABC，D、E分别在BC、AC上，且CD=AE，AD、BE相交于点P，试求∠BPD的度数．