以下药物中含哌啶环结构的药物是()
A.氟尿嘧啶
B.可乐定
C.加巴喷丁
D.氨苯蝶啶
E.哌替啶
参考答案:E
解析:
哌替啶结构中含有哌啶环部分。
酸雨的危害不包括
A.使土壤酸化B.使植物叶绿素增多C.使鱼贝类死亡D.增加农作物中的有害物质含量E.腐蚀建筑物
对话填词。
A: What's this?
B: It's a photo 1_______ my sister.
A: You have a nice sister.
B: Thanks.
A: Where 2_______ your sister work?
B: She 3_______ at a hospital.
A: What 4_______ she do?
B: She is a doctor. What 5_______ your sister?
A: She is a doctor, 6_______.
B: Does she like the job?
A: No. she 7_______ it's difficult.
B: What does she want to 8_______?
A: Sorry, I don't know.