问题
单项选择题
平静呼吸时每次吸入和呼出的气量是（）
A.残气量
B.通气量
C.肺总量
D.肺活量
E.潮气量
答案
参考答案：E
搜题请搜索小程序“爱下问搜题”
平静呼吸时每次吸入和呼出的气量是（）
A.残气量
B.通气量
C.肺总量
D.肺活量
E.潮气量
参考答案：E
In learning English, one should first pay attention to listening and speaking. It is the groundwork (基础) of reading and writing. You’d better your best to speak while you do much listening. Don’t be of making mistakes. But be careful not to let them stop (阻止) you from improving your . While you are doing this, a good is to write or keep a diary, write notes or letters. Then if you can, ask some others to go through (浏览) you have written and tell you where it is wrong. Many mistakes in your speaking will be found when you write. Through correcting mistakes, you can do better in learning English. If you are slow in speaking, don’t about it. One of the helpful ways is reading, either aloud or to yourself. The important thing is to choose interesting to read. It mustn’t be too difficult for you. When you are reading this way, don’t stop to the new words if you can guess their meanings when they have nothing to do with the sentences. You can do that some other time.
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下列实验中操作及现象与结论对应关系正确的一组是( )
| 实验操作 | 实验现象 | 实验结论 | |
| A | 在铁粉和铝粉中加入过量的氢氧化钠溶液,完全反应后过滤 | 产生白色沉淀 | 可以除去铁粉中混有的少量铝粉 |
| B | 二氧化硫通入溴水中 | 溶液褪色 | 二氧化硫有漂白性 |
| C | 向某溶液中加入NaOH并微热 | 产生能够使湿润的红色石蕊试纸变蓝的无色气体 | 该溶液中一定含有N |
| D | 淀粉和稀硫酸混合共热后,再加少量新制氢氧化铜悬浊液 | 产生砖红色沉淀 | 淀粉水解可生成葡萄糖 |