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问题 单项选择题

氨基酸类药最常用的鉴别反应是

A．双缩脲反应生蓝色

B．茚三酮反应生蓝紫色

C．氧化反应，生氨臭

D．酸性反应，使蓝试纸变红

E．氨基的碱性反应使红试纸变蓝

答案

参考答案：B

选择题

Lin Lin has       .

A．long black hair      B．long black hairs     C．black long hair
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听力题

根据句意和汉语注释，写出单词的正确形式。

小题1:When you are in danger, it is important to make yourself not ___________ (紧张) and calm down.

小题2:We had a hard time driving to work today. Just hope tomorrow will be less ___________ (有雪的).

小题3:His body ___________ (温度) keeps rising. We need to send for a doctor right away.

小题4:Seeing the air crash, she could feel her own heart ___________ (作节奏运动) quickly.
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