题目

阅读下文并回答问题My name is Clark. I have three friends. They all have some rules to follow. Lily is a girl from London. She likes music very much, but she doesn’t like studying (学习). Her parents want her to do well in her study, but she always can’t finish her school work. Now her parents ask her to study every night, and she can’t listen to music when she studies. Betty is from China. She is 15 years old. She is a little lazy (懒惰的), because she never helps her mother do housework (家务) at home. At school she has lots of friends. And she must go home before 8:30 p观察植物细胞的质壁分离和质壁分离复原的实验，可以说明的问题是A．细胞壁的成分是纤维素和果胶 B．原生质层相当于一层半透膜 C．植物细胞能从高浓度溶液中吸水 D．蔗糖通过主动运输进入细胞