— Mum, I want to go shopping with Peter, but I don't have any money.

— All right. _____ my purse. [ ]

A. It's

B. There's

C. Here's

D. There're

高聚物链运动具有如下特点（）。

A.分子量的多分散性

B.运动单元多重性

C.运动对时间依赖性

D.运动对温度依赖性