问题
单项选择题
下列哪项不符合室间隔缺损的临床表现
A．生长发育落后，活动耐力差，气促
B．易反复发生肺部感染
C．胸骨左缘2～3肋间有Ⅱ级柔和收缩期杂音
D．心电图可正常或左室肥大，严重者可出现右室肥大
E．X线胸片示肺血管增粗，左心室增大，左房也可增大
答案
参考答案：C
解析： 室间隔缺损可闻及胸骨左缘3～4肋间(3～5)/6全收缩期反流性杂音。
搜题请搜索小程序“爱下问搜题”
下列哪项不符合室间隔缺损的临床表现
A．生长发育落后，活动耐力差，气促
B．易反复发生肺部感染
C．胸骨左缘2～3肋间有Ⅱ级柔和收缩期杂音
D．心电图可正常或左室肥大，严重者可出现右室肥大
E．X线胸片示肺血管增粗，左心室增大，左房也可增大
参考答案：C
解析： 室间隔缺损可闻及胸骨左缘3～4肋间(3～5)/6全收缩期反流性杂音。
Peter’s job was to examine cars when they crossed the frontier(边界) to make sure that they were not smuggling(走私) anything into the country. Every evening he would see a factory worker coming the hill towards the frontier, a bike with grass on it. When the bike the frontier, Peter would stop the man and him take the grass off. Then he would examine the straw very to see whether he could find anything, after which he would look in all the man’s pockets he let him tie(捆绑) the grass again. The man would then put it on his bike and go off down the hill with it. Although Peter was always to find gold or other valuable things hidden in the straw, he never found . he was sure the man was smuggling something, but he was not to think out what it could be. Then one evening, after he had looked ____ the grass and emptied the worker's pockets ____ usual, he ____ to him, "Listen, I know you are smuggling things ____ this frontier. Won't you tell me what it is? I'm an old man, and today's my last day on the job. Tomorrow I'm going to retire (退休). I promise I shall not tell ____ if you tell me what you've been smuggling." The worker did not say anything for ____. Then he smiled, turned to Peter and said quietly, "Bikes." |
随着人们生活水平的提高，庐江县私家车数量不断增加，给人们出行带来很多方便．请回答下列问题：
（1）目前汽车使用的燃料是汽油．将石油加热，利用各成分的沸点不同将它们分离可得到汽油．我国已推广使用车用乙醇汽油，它是在汽油中加入适量的乙醇，作为汽车的燃料．下列叙述正确的是______．
A．乙醇汽油是一种新型的化合物
B．乙醇可通过粮食发酵的方法制得
C．使用乙醇汽油能减少有害气体的排放
D．乙醇和汽油都是可再生能源
（2）汽车尾气（含有CO、NO等物质）是城市空气的污染物，治理的方法之一是在汽车的排气管上装一个催化转换器，使CO和NO反应，生成两种无毒气体，试写出CO和NO反应的化学方程式______．
（3）2011年5月我国分布严禁酒后驾车新条例，下表是国家对“饮酒驾车”和“醉酒驾车”的界定标准：
| 饮酒驾车 | 20毫克/100毫升≤血液中的酒精含量＜80毫克/100毫升 |
| 醉酒驾车 | 血液中的酒精含量≥80毫克/100毫升 |
①饮酒会使人的神经系统过度兴奋或麻痹抑制，容易引发交通事故．某人饮酒后驾车，被交警发现，经测定其每100毫升血液中酒精含量为93毫克，属于______驾车；
②各种饮用酒里都含有一定量的乙醇，青少年正处于身体发育阶段，绝对不能酗酒．下列说法中不正确的是______
A．乙醇俗称为酒精，过度饮酒有害健康
B．饮酒有益驾驶
C．工业酒精中含有少量有毒的甲醇，禁止饮用工业酒精
D．乙醇易燃常用作酒精灯、火锅、内燃机的燃料．