高考每日一练（2019/9/25）

第1题：以紫色洋葱鳞叶为材料进行细胞质壁分离和复原的实验，原生质层长度和细胞长度分别用X和Y表示(如图6)，在处理时间相同的前提下 A．同一细胞用不同浓度蔗糖溶液处理，X/Y值越小，则紫色越浅 B．同一细胞用不同浓度蔗糖溶液处理，X/Y值越大，则所用蔗糖溶液浓度越高 C．不同细胞用相同浓度蔗糖溶液处理，X/Y值越小，则越易复原 D．不同细胞用相同浓度蔗糖溶液处理，X/Y值越大，则细胞的正常细胞液浓度越高

【单选题】： A     B     C     D

第2题：如图，一理想变压器原、副线圈的匝数分别为n1、n2。原线圈通过一理想电流表接正弦交流电源，一个二极管和阻值为R的负载电阻串联后接到副线圈的两端；假设该二极管的正向电阻为零，反向电阻为无穷大；用交流电压表测得a、b端和c、d端的电压分别为Uab和Ucd，则： A．Uab:Ucd=n1:n2 B．增大负载电阻的阻值R，电流表的读数变小 C．负载电阻的阻值越小，cd间的电压Ucd 越大 D．将二极管短路，电流表的读数加倍

【多选题】： A     B     C     D

第3题：

【分析题】：

第4题：从2009年1月1日至2010年1月1日，我国事业单位分三步实施绩效工资制度。实施绩效工资有利于( ) ①消除事业单位收入分配的差距 ②完善我国分配激励机制和健全分配的宏观调控机制 ③调动事业单位工作人员的积极性 ④促进社会事业发展，提高公益服务水平 A、①③④ B、①②③ C、①②④ D、②③④

【单选题】： A     B     C     D

第5题：The teacher warned that whoever was caught ______ during the test would be punisheD、 A、cheat B、cheating C、to cheatD、to be cheating

【单选题】： A     B     C     D

第6题：

【分析题】：

第7题：_______ you start eating in a healthier way, weight control will become much easier. A、unless B．Although C．Before D．Once

【单选题】： A     B     C     D

第8题： 下列属于主动转运过程的是 A．O2进入细胞内 B．Ca2+由细胞内出来 C．K+由细胞内出来 D．Na+进入细胞 E．CO2从细胞内出来

【单选题】： A     B     C     D     E

第9题：No woman can be too rich or too thin. This saying often attributed to the lateDuchess (公爵夫人) of Windsor embodies much of the odd spirit of our times.Being thin is deemed as such a virtue. The problem with such a view is that some people actually attempt to live by it. I myself have fantasies of slipping into narrow designer clothes.Consequently, I have been on a diet for the better—or worse—part of my life.Being rich wouldn’t be bad either, but that won’t happen unless an unknown relative dies suddenly in some distant land, leaving me millions of dollars. Where did we go off the track When did eating butter become a sin, and a little bit of extra flesh unappealing, if not repellentAll religions have certain days when people refrain from eating, and excessive eating is one ofChristianity’s seven deadly sins. However, until quite recently, most people had a problem getting enough to eat. In some religious groups, wealth was a symbol of probable salvation and high morals, and fatness a sign of wealth and well-being. Today the opposite is true. We have shifted to thinness as our new mark of virtue. The result is that being fat—or even only somewhat overweight—is bad because it implies a lack of moral strength. Our obsession (迷恋) with thinness is also fueled by health concerns. It is true that in this country we have more overweight people than ever before, and that, in many cases, being overweight correlates with an increased risk of heart and blood vessel disease. These diseases, however, may have as much to do with our way of life and our high-fat diets as with excess weight.And the associated risk of cancer in the digestive system may be more of a dietary problem—too much fat and a lack of fiber—than a weight problem. The real concern, then, is not that we weigh too much, but that we neither exercise enough nor eat well.Exercise is necessary for strong bones and both heart and lung health.A、balanced diet without a lot of fat can also help the body avoid many diseases. We should surely stop paying so much attention to weight. Simply being thin is not enough. It is actually hazardous if those who get (or already are) thin think they are automatically healthy and thus free from paying attention to their overall life-style. Thinness can be pure vainglory (虚荣). In the eyes of the author, an odd phenomenon nowadays is that ______. A、religious people are not necessarily virtuous B、looking slim is a symbol of having a large fortune C、being thin is viewed as a much desired quality D、theDuchess of Windsor is regarded as a woman of virtue

【单选题】： A     B     C     D

第10题： A． B． C． D．

【单选题】： A     B     C     D