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问题 填空题

扑热息痛(学名对乙酰氨基酚)是生活中常用到的一种解热镇痛药。以苯为原料合成扑热息痛的部分转化如下:ABC→…→D

请回答下列问题:

(1)B→C的反应类型为　　　　,D中官能团的名称为　　　　　　　　　。

(2)C的结构简式为　                  。

(3)1 mol 扑热息痛与足量NaOH溶液反应,理论上消耗NaOH的物质的量为　　　　mol。

(4)实验证明B能够与溴水反应,试写出其反应的化学方程式:                           　。

(5)扑热息痛有多种同分异构体,同时符合下列要求的同分异构体有　　　　种。

①苯环上有两个对位取代基　②属于氨基酸

答案

(1)取代反应　(酚)羟基、氨基

(2)

(3)2

(4)+3Br2↓+3HBr

(5)2

采用正逆推相结合的方法,根据D与CH3COOH生成扑热息痛(含肽键)知D为,则由A知该反应为取代反应,A为,AB,该反应为水解反应,则B为,再由C知,该反应为引入硝基的取代反应且是对位硝基取代,所以C为,观察B→C的反应,即,发现酚羟基中的氢原子被—CH3代替,则该反应同时生成小分子HI。

(3)1 mol扑热息痛中1 mol肽键消耗1 mol NaOH、1 mol酚羟基消耗1 mol NaOH,共消耗2 mol NaOH。

(5)氨基酸中含—COOH、—NH2两个官能团,除了苯环外,还只能有一个—CH2—基团,所以符合条件的物质有和。

单项选择题

下列慢性颅内压增高所引起头颅X线改变，哪条是错误的（）

A.脑回压迹增多加深

B.颅缝增宽

C.蛛网膜粒压迹扩大、增深

D.枕大孔扩大

E.蝶鞍扩大，前后床突及鞍背的骨质吸收
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单项选择题

Strange things have been happening to England. Still (1) from the dissolution of the empire in the years (2) World War Ⅱ, now the English find they are not even British. As the cherished "United Kingdom" breaks into its (3) parts, Scots are clearly (4) and the Welsh, Welsh. But who exactly are the English What’s left of them, with everything but the (5) half of their island taken away

Going back in time to (6) roots doesn’t help. First came the Celts, then the Romans, then Angles, Saxons, Jutes, Danes. Invasion after invasion, until the Norman Conquest. English national identity only seemed to find its (7) later, on the shifting sands of expansionism, from Elizabethan times onwards. The empire seemed to seal it. But now there’s just England, (8) of a green island in the northern seas, lashed by rain, scarred by two (9) of vicious industrialization fallen (10) dereliction, ruined, as D．H. Lawrence thought, by "the tragedy of ugliness," its abominable architecture.

Of all English institutions, the one to (11) on would surely be the pub. Shelter to Chaucer’s pilgrims, home to Falstaff and Hal, throne of felicity to Dr. Johnson, the pub- that smoky, yeasty den of jollity-is the womb of (12) , if anywhere is. Yet in the midst of this national (13) crisis, the pub, the mainstay of English life, a staff driven (14) into the sump of history, (15) as the Saxons, is suddenly dying and evolving at (16) rates. Closing at something like a rate of more than three a day, pubs have become (17) enough that for the first time since the Domesday Book, more than half the villages in England no longer have one. It’s a rare pub that still (18) , or even limps on, by being what it was (19) to be: a drinking establishment. The old (20) of a pub as a place for a "session," a lengthy, restful, increasingly tipsy evening of swigging, is all but defunct.

19（）

A.asked

B.born

C.meant

D.required
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