题目

铅蓄电池是常见的二次电池，其放电反应和充电反应表示如下： Pb(s)＋PbO2(s)＋2H2SO4(aq)2PbSO4(s)＋2H2O(l)则下列说法不正确的是（   ） A．充电时，PbSO4在两极上除去     B．放电时，电解质溶液的质量减少 C．放电时，PbSO4只在负极生成     D．充电时，阳极的电极反应式为：PbSO4＋2H2O-2e-= PbO2+4H++SO42- 答案：CA  School  ReportName:Edward ScottSchool:  Kelvin Grove State High School，London Grade7Term endingMay 6thSubjects               MathsHe is a little weak in this, but he has tried his best to catch up with others.Science :   He can work out many difficulties. Well done!English :   He is the best in the class. Keep it up!French:   His reading is very good, and he can remember many words.History:    He is not so good at this, but he has done better than before.Geography: He knows the names of many places in the world.Music    He does like pop songs, and he sings very well.Remarks(评语)  Edward has the ability to do a lot better. More work is needed next term.Class teacherIvyPrincipalM.L MartinSchool reopens 11, September 【小题1】After reading this, we know this is ________.A．a studying planB．a teaching planC．a school reportD．a working plan【小题2】 Which of the following is not mentioned in the form? ____.A．P.E.B．MusicC．MathematicsD．History【小题3】 Edward’s best subject is ________.A．ScienceB．EnglishC．GeographyD．French【小题4】Edward is NOT so good at ________.A．maths and historyB．science and geographyC．history and FrenchD．music and English【小题5】 According to the form, which of the following sentences is true? A．Edward can’t sing songs very well.B．School will begin again on May 6th.C．Edward can do better if he works hard next term. D．Edward doesn’t do well in science.