题目

生物实验中常用盐酸处理实验材料。下列说法正确的是 A. 盐酸解离根尖的同时也为龙胆紫染色创造酸性环境 B. 盐酸处理染色质能促进 DNA 与派洛宁（吡罗红）结合 C. 盐酸浓度过高会破坏过氧化氢酶的空间结构导致其失活 D. 盐酸处理细胞有利于健那绿（詹纳斯绿 B）对线粒体染色 答案：A: Hi, Lucy. Nice to see you. B: Hey, Xiao Ming. I’m going to stay here to spend the Mid—autumn Festival. 1.A: 2. The Mid—autumn Festival always comes on the 15th of the eighth lunar month.B: 3.A: In our Chinese tradition, it is the time for the family to get together. People eat mooncakes and enjoy the bright full moon on that day.B: 4. I can’t wait for the coming of that day.A: If so, you can come to celebrate it with my family.B: Can I? 5.A.Sounds great!B.That’s very kind of you.C.Can you tell me something about it?D.With pleasure.E.How do you celebrate it?