高考每日一练（2019/4/8）

第1题：镰刀形贫血是因为血红蛋白β链基因上哪种突变引起的 A．点突变 B．插入 C．缺失 D．倒位 E．移码突变

【单选题】： A     B     C     D     E

第2题：空间有一圆柱形匀强磁场区域，该区域的横截面的半径为R，磁场方向垂直横截面。一质量为m、电荷量为q(q＞0)的粒子以速率v0沿横截面的某直径射入磁场，离开磁场时速度方向偏离入射方向60°。不计重力，该磁场的磁感应强度大小为A． B． C． D．

【单选题】： A     B     C     D

第3题：下面关于我国正在建造的大型射电望远镜的图片和文字材料，是某所中学科技节期间一块展板上的内容。请筛选相关信息，以解说员的身份，向前来参观的同学作介绍。要求：简明、生动、得体，至少运用一种修辞手法，不超过100字。(6分) 名 称：500米口径球面射电望远镜选址特点：贵州黔南平塘县天然喀斯特洼坑构造特点：球冠状反射面由约1800个六边形球面单元拼合而成建造特点：利用四面环山、中间凹陷的天然喀斯特洼坑铺设超大口径的球冠状反射面用途：将我国空间测控范围由地球同步轨道延伸至太阳系外缘，探测宇宙中的遥远信号和物质，搜索地外文明和生物意义：将成为世界上最大的天文射电望远镜，未来20~30年处于世界一流地位答：________________________________________________________________

【分析题】：

第4题：

【分析题】：

第5题： 白细胞增多的定义为，白细胞计数高于 A．3.5乘以十的九次方/L B．4.0乘以十的九次方/L C．4.5乘以十的九次方/L D．10乘以十的九次方/L E．100乘以十的九次方/L

【单选题】： A     B     C     D     E

第6题：(本小题满分13分)

【分析题】：

第7题：家畜饲养业是在狩猎经济的基础上发展起来的。家畜饲养业最初发生在( )。 A．原始人群时期 B．猿人时期 C．父系氏族公社时期 D．母系氏族公社时期

【单选题】： A     B     C     D

第8题：“蓝脸的窦尔敦盗御马，红脸的关公战长沙，黄脸的典韦白脸的曹操，黑脸的张飞叫喳喳。”京剧艺术中人物的脸谱 A、真实再现了客观历史 B．固化了大众的历史认知 C．正确评断了历史人物 D．提升了历史人物的价值

【单选题】： A     B     C     D

第9题：Not too many decades ago it seemed "obvious" both to the general public and to sociologists that modern society has changed people’s natural relations, loosened their responsibilities to kin (亲戚) and neighbors, and substituted in their place superficial relationships with passing acquaintances. However, in recent years a growing body of research has revealed that the "obviousness" is not true. It seems that if you are a city resident, you typically know a smaller proportion of your neighbors than you do if you are a resident of a smaller community.But, for the most part, this fact has few significant consequences. It does not necessarily follow that if you know few of your neighbors you will know no one else. Even in very large cities, people maintain close social ties within small, private social worlds. Indeed, the number and quality of meaningful relationships do not differ between more and less urban people. Small-town residents are more involved with kin than are big-city residents. Yet city dwellers compensate by developing friendships with people who share similar interests and activities. Urbanism may produce a different style of life, but the quality of life does not differ between town and city. Nor are residents of large communities any likelier to display psychological symptoms of stress or alienation, a feeling of not belonging, than are residents of smaller communities. However, city dwellers do worry more about crime, and this leads them to a distrust of strangers. These findings do not imply that urbanism makes little or no difference. If neighbors are strangers to one another, they are less likely to sweep the sidewalk of an elderly couple living next door or keep an eye out for young troublemakers. Moreover, as Wirth suggested, there may be a link between a community’s population size and its social heterogeneity (多样性). For instance, sociologists have found much evidence that the size of a community is associated with bad behavior including gambling, drugs, etC、Large-city urbanites are also more likely than their small-town counterparts to have a cosmopolitan (见多识广者的) outlook, to display less responsibility to traditional kinship roles, to vote for leftist political candidates, and to be tolerant of nontraditional religious groups, unpopular political groups, and so-called undesirables.Everything considered, heterogeneity and unusual behavior seem to be outcomes of large population size. According to the passage, it was once a common belief that urban residents ______. A、did not have the same interests as their neighbors B、could not develop long-standing relationships C、tended to be associated with bad behavior D、usually had more friends

【单选题】： A     B     C     D

第10题： 有关肺牵张反射的叙述，错误的是( )。 A．是由肺扩张或缩小引起的反射 B．又称黑—伯氏反射 C．肺泡内存在牵张感受器 D．初生婴儿敏感性较高 E．在平静呼吸时不起重要作用

【单选题】： A     B     C     D     E