单选题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.

单选题 关于正常子宫内膜的基本结构，错误的是 ( ) A、子宫内膜分为基底层和功能层 B、致密层为功能层的表层 C、海绵层腺体最多 D、基底层对卵巢激素反应最敏感 E、功能层有周期性变化

单选题可引起空气栓塞的是

单选题炎症时，下列哪项不具有防御作用______

单选题 动作速度主要依靠（ ）。 A、磷酸原系统供能 B、乳酸能系统供能 C、有氧氧化供能 D、无氧系统供能

单选题A．乙酰胆碱B．P物质C．谷氨酸D．甘氨酸E．GABA

单选题风湿病时，心内膜疣状赘生物属于

单选题 A药的LD50值比B药大，说明（ ） A、A药毒性比B药大 B、A药毒性比B药小 C、A药的效能比B药大 D、A药的效能比B药大 E、以上都不对

单选题患者，20岁，骨折愈合良好，5年后骨折处骨组织病理变化表现为( )(2011年)

单选题阻断-侧颈总动脉可使( ) A．血压升高 B．心率减慢 C．窦神经传入冲动增多 D．血管运动中枢活动减弱 E．心迷走中枢活动加强

单选题交互抑制的形成是由于( ) A．兴奋性递质释放量少 B．兴奋性递质破坏过多 C．兴奋性中间神经元兴奋 D．抑制性中间神经元兴奋 E．去极化抑制

单选题 酶缺陷导致旁路代谢副产物累积可引起 A、胱氨酸尿症 B、糖尿病 C、尿黑酸尿症 D、痛风 E、苯丙酮酸尿症

单选题下列中最支持麻疹病毒性肺炎时组织学特点是

单选题第一心音的产生主要是由于( )(1990年)

单选题男，61岁，胃癌广泛转移而死亡。尸体解剖检查，心脏重200g。切片检查心肌细胞核两侧可见黄褐色细颗粒状色素，此色素是

单选题关于肾上腺髓质的叙述，下列哪项是错误的( ) A．受交感神经节前纤维支配 B．神经末梢释放乙酰胆碱 C．神经递质作用于嗜铬细胞上的N型受体 D．主要释放去甲肾上腺素 E．在应急反应时激素释放增加

单选题 下列关于多基因遗传的哪些说法是错误的 A、遗传基础是主要的 B、多为两对以上等位基因 C、这些基因性质为共显性 D、环境因素起到不可替代的作用 E、微效基因和环境因素共同作用

单选题 前列腺癌主要发生于：（ ） A、外周区和移行区 B、中央区和移行区 C、纤维基质肌肉区和中央区 D、尿道周围组织和纤维基质肌肉区 E、尿道周围组织和外周区

单选题机体的内环境是指( )(2005年)

单选题血凝块回缩的主要原因是( )(2007年)