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单选题干扰素抑制蛋白质生物合成是因为

单选题在前列腺增生症发生中，最重要的激素是

单选题Rh阴性的母亲生下Rh阳性子女，有可能( )(2011年)

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单选题关于淋巴细胞的叙述，哪一项是错误的

单选题关于ATP合酶正确的是

单选题A．纤维素性炎B．变态反应性炎C．化脓性炎D．浆液性炎

单选题不属于三期梅毒的病变是

单选题在骨骼肌收缩过程中，能与细肌丝结合的是

单选题A．强直后增强B．习惯化C．敏感化D．长时程增强E．长时程抑制

单选题完成氧化脱氨基作用的酶是

单选题中枢化学感受器的生理性刺激是

单选题乳腺单纯癌是指

单选题The Southdale shopping centre in Minnesota has an atrium, a food court, fountains and acres of parking. Its shops include a Dairy Queen, a Victoria's Secret and a purveyor of comic T-shirts. It may not seem like a landmark, as important to architectural history as the Louvre or New York's Woolworth Building. But it is. "oh, my god!" chimes a group of teenage girls, on learning that they are standing in the world's first true shopping mall. "That is the coolest thing anybody has said to us all day. " In the past half century Southdale and its many imitators have transformed shopping habits, urban economies and teenage speech. America now has some 1,100 enclosed shopping malls, according to the International Council of Shopping Centres. Clones have appeared from Chennai to Martinique. Yet the mall's story is far from triumphal. Invented by a European socialist who hated cars and came to deride his own creation, it has a murky future. While malls continue to multiply outside America, they are gradually dying in the country that pioneered them. Southdale's creator arrived in America as a refugee from Nazi-occupied Vienna. Victor Gruen was a Jewish bohemian who began to design shops for fellow immigrants in New York after failing in cabaret theatre. His work was admired partly for its uncluttered, modernist look, which seemed revolutionary in 1930s America. But Gruen's secret was the way he used arcades and eye-level display cases to lure customers into stores almost against their will. As a critic complained, his shops were like mousetraps. A few years later the same would be said of his shopping malls. By the 1940s department stores were already moving to the suburbs. Some had begun to build adjacent strips of shops, which they filled with boutiques in an attempt to re-create urban shopping districts. In 1947 a shopping centre opened in Los Angeles featuring two department stores, a cluster of small shops and a large car park. It was, in effect, an outdoor shopping mall. Fine for balmy southern California, perhaps, but not for Minnesota's harsh climate. Commissioned to build a shopping centre at Southdale in 1956, Gruen threw a roof over the structure and installed an air-conditioning system to keep the temperature at 75°F (24℃)—which a contemporary press release called "Eternal Spring". The mall was born. Gruen got an extraordinary number of things right first time. He built a sloping road around the perimeter of the mall, so that half of the shoppers entered on the ground floor and half on the first floor-something that became a standard feature of malls. Southdale's balconies were low, so that shoppers could see the shops on the floor above or below them. The car park had animal signs to help shoppers remember the way back to their vehicles. It was as though Orville and Wilbur Wright had not just discovered powered flight but had built a plane with tray tables and a duty-free service.

单选题风湿病的病因和发病机制的描述中，哪一项是不恰当的

单选题A．瓣膜穿孔B．瓣膜增厚、粘连、卷曲C．室间隔缺损D．瓣膜闭锁缘粟粒状赘生物E．在已有病变的心瓣膜上形成菜花状、易脱落的赘生物

单选题下列哪一项不是促胰液素的作用

单选题A．微动脉B．微静脉C．小动脉和毛细血管D．小静脉和毛细血管