题目

阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项。Angela never liked seeing plastic waste washing up on theshore near her home. She had been 1 tocall on her community to clean it up, to change the 2,so she tried to set up an organization called Washed Ashore：Art to Save the Sea. Her 3 provedquite a success. Here's how it 4. Volunteers help clean up 300 miles ofshoreline. Then, 5 only plastic from the beach cleanup, Angelaand many other volunteers create sculptures of sea 6.She explains, I mean to create sculptures that下图表示渗透作用装置图，其中半透膜为膀胱膜，图1、3装置溶液A、B、a、b浓度分别用MA、MB、Ma、Mb表示，图2、4分别表示一段时间后，图1、3液面上升的高度h1、h2。如果A、B、a、b均为蔗糖溶液，且MA>MB、Ma=Mb>MA，则达到平衡后 A．h1＞h2  Ma＞Mb            B．h1＞h2  Ma＜Mb    C．h1＜h2  Ma＜Mb            D．h1＜h2  Ma＞Mb[来源:]