问题
单项选择题
氨基酸与蛋白质的共性是( )。
A．胶体性质
B．沉淀反应
C．变性性质
D．两性性质
答案
参考答案：D
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氨基酸与蛋白质的共性是( )。
A．胶体性质
B．沉淀反应
C．变性性质
D．两性性质
参考答案：D
| Choose the best sentences from A to E in the box to fill in the dialogue. | |
| A: I'm going to Canada next month. B: 1. Canada is a beautiful country. 2. A: Because I'm going there on business. B: 3. A: Both English and French. B: That means 4. If you know either English or French. A: That's right. B: 5. A: Not really. But I'll try my best both of them.
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