题目

某同学进行下列实验，甲图为实验开始状态，乙图为实验结束状态。请在乙图所示实验结果的基础上再设计一个简便实验，探究麦芽糖的水解产物能否通过半透膜。   增添的实验材料：适宜浓度的麦芽糖酶溶液、滴管、记号笔等（假设实验温度条件适宜）。 （1）写出你所设计实验的实验原理：                                            。 （2）简要写出你所设计的实验步骤： ①                                 1. They were d ___________ (下决心) to reach the top of the mountain.  2. He was a_____________ in the book, so he didn’t hear the doorbell.   3. He finished his work in a____________(积极的) way.  4. He became______________(狂热的) about classical music. 5. Don't ____________(暴露) your skin to the sun or you will be burned. 6. If a doctor or a medical treatment c_____ someone's illness, they make the people well again.  7. The common interests u__________ the two countries.  8. The class ____________of (组成) 56 members. 9. Some parents considered that some of their children's friends to be a bad _______ (影响) to their children.  10. There are plans to c_________ a new road bridge across the river to ease the traffic problems in this area.