题目内容

关于马来酸氯苯那敏的叙述不正确的是

A. 氨基醚类H1受体拮抗药
B. 加稀硫酸及高锰酸钾试液颜色褪去
C. 具有酸性
D. 分子结构中有1个手性碳原子,药用为外消旋体

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属于非镇静H1受体拮抗剂的药物是

A. 氯苯那敏
B. 酮替芬
C. 西替利嗪
D. 赛庚啶

1. n. choice; power or freedom of choosing 选择;选择权2. v. go beyond in quantity, degree, etc. 超过3. be the same in quantity, size, degree, or value 与…相等的,与…相同的4. a. in an early state of development 发展初期的,新兴的5. a. having the usual qualities of a particular group or thing 典型的,有代表性的6. 采访;面谈,面试7. 认出,确认8. 身份9. (infml) understand the meaning of; solve or discover the cause of a problem 弄懂;找……的原因10. test (sth.) new or different to see if it is effective 试验11. start out for or toward 向……进发,前往12. leave one’s present job, or activity and start doing another one 接着做,改做(别的事)13. n. 伙伴;合伙人;配偶14. n. sth. that one must do because of a law, rule, promise, etc. 义务,责任15. vt. send (sb.) a text message 用手机(给……)发送信息16. establish or create (sth.) through effort 开创17. n. time in a person’s life between childhood and mature adulthood 青春期,青少年时期18. a. hopeful and confident about the future 乐观的,乐观主义的19. a. concerning money and finance 财务的,金融的

非周期序列可以通过________(DTFT/DFS)得到其数字域频谱,其频谱是________(周期/非周期)________(连续/离散)的;对原信号进行周期为N的延拓,则可以通过________(DTFT/DFS)得到其数字域频谱,其频谱是________(周期/非周期)________(连续/离散)的。

3.铅笔铅芯的软硬H、B表示, H前面的数字愈大表示铅芯愈 (硬或软)

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