问题
单项选择题
鸟氨酸脱羧生成
A.多巴胺
B.腐胺
C.酪胺
D.尸胺
答案
参考答案:B
鸟氨酸脱羧生成
A.多巴胺
B.腐胺
C.酪胺
D.尸胺
参考答案:B
补全对话 阅读对话,从每题ABCD四个选项中,选出一个最佳答案完成对话(5分) A: Hi, Li Tao! Could you please tell me something about your new pen pal? B: A:-Thanks. What's his name? B: His name is Richard Evans and he's living with his parents in Hangzhou now. A: Uh-huh. Where is he from? B: He comes from Canada. Richard was born in Toronto. A: Uh-huh. B: He's 15 years old. A: B: Oh, he speaks English and French, and he says he is learning Chinese now. A: Really? Many foreigners think Chinese is a difficult language. B: Yes, he does. But he works very hard at it. His family are going back to Canada this July. He has invited me to take a vacation there and he can learn Chinese from me by the time. A: How cool! Have you decided to go? B: Yes, I have.
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