指出下列结构的药物名称（）。
A．肾上腺素
B．去甲肾上腺素
C．异丙肾上腺素
D．多巴胺
E．麻黄碱
参考答案：C
解析：
儿茶酚类拟肾上腺素药
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用所给的词的适当形式填空。
1. Xiao Gang spends much time _________ ( play) computer games.
2. The little boy has only eight _________ (tooth) now.
3. Will you ________ (take) part in the long jump ?
4. I think I must do my best _________ (improve) my English.
5. You must do sports to keep _________ (health).
must do my best _________ (improve) my English.