三萜皂苷结构中多具有羧基,所以又常被称为()皂苷。
参考答案:酸性
补全对话:用适当的句子补全对话,使对话意思完整,每空一句。(10分)
A: Hello, may I speak to Ivan,please?
B: Yes.小题1: ___________________.
A: Hello, Ivan! This is Bill speaking.It’s Sunday tomorrow. What are you going to do?
B:小题2: . Do you have any ideas?
A: There is a fashion show in Huanghe Park tomorrow.小题3: ______________________?
B: Good idea. 小题4: ?
A: Let’s meet outside the school gate at half past eight in the morning.
B: How shall we go there?
A: 小题5: .
B: Sorry, my bike is broken.Let’s go by bus,OK?
A: All right. See you!
B: See you!
记忆按内容进行分类,可以分为形象记忆、语词逻辑记忆、情绪记忆和()。
A.运动记忆
B.工作记忆
C.长时记忆
D.情感记忆