小红尿液化验单上显示尿液中有红细胞和蛋白质，估计病变的部位最可能是（ ）
A．入球小动脉
B．出球小动脉
C．肾小球
D．肾小管
尿的形成包括：肾小球和肾小囊内壁的过滤和肾小管的重吸收作用．当血液流经肾小球的和肾小囊内壁时，除大分子的蛋白质和血细胞不能被过滤外，血浆中的一部分水、无机盐、葡萄糖和尿素等物质都可以过滤到肾小囊腔中形成原尿；当原尿流经肾小管时，原尿中大部分的水、全部的葡萄糖、部分无机盐被肾小管外包绕的毛细血管重新吸收回血液，而剩下的水、尿素和无机盐等就形成了尿液．据以上知识判断：正常的尿液中不会有蛋白质和红细胞，若出现了，可能是肾小球有炎症通透性增强使本来不能过滤的红细胞、蛋白质被过滤到原尿内，而肾小管对红细胞、蛋白质没有重吸收作用导致的．
故选C
Harald Kaas was sixty. His back became rounded, and he bent a little. His forehead, always of the broadest－no one else’s hat would fit him － was now one of the highest, that is to say, he had lost all his teeth, which were strong though small, and blackened by smoking. Now, instead of “deuce take it” he said “deush take it”. He had always held his hands half closed as though grasping something; now they stiffened so that he could never open them fully. The little finger of his left hand had been bitten off. According to Harald’s version of the story, the fellow swallowed the piece on the spot. He was fond of showing off the left part, and it often served as an introduction to the history of brave adventures, which became greater and greater and greater as he grew older and quieter. His small sharp eyes were deep set and looked at one with great intensity. There was power in his individuality. He has no lack of self-respect. His house, raised on an old foundation, looked out to the south over many islands; farther out were more islands and the open sea. Its eastern wing was barely half furnished, and the western inhabited by Harald Kaas. These wings were connected by a gallery, behind which were the fields and woods to the north. In the gallery itself were heads of bears, wolves, foxes and lynxes and stuffed birds from land and sea. Skins and guns hung on the walls of the front room. The inner rooms were also full of skins and filled with the smell of wild animals and tobacco-smoke. Harald himself called it “man-smell”; no one who had once put his nose inside could ever forget it. Valuable and beautiful skins hung on the walls and sat, and walked on skins, and each one of them was a subject of conversation. Harald Kaas, seated in his log chair by the fireside, his feet on the bearskin, opened his shirt to show the scars on his hairy chest (and what scars they were) which had been made by a bears teeth, when he had driven his knife, right up to the end, into the monster’s heart. All the tables, and cupboards, and carved chairs listened in their silence. 68．Who or what most probably bit harald Kaass’ little finger off? A．On of his fellow hunters B．An adversary in a boxing match C．A wild animal D．One of his hunting dogs
70．What can we say about Harald Kaas in the story? A．Brave and strong now , he was the best bunter in the neighborhood. B．Old and lonely now, he never forgot his great past hunting life. C．Always greedy and cruel, he was rich by hunting and selling animals. D．Still active and busy, he managed to protect his neighborhood by killing animals. |
