题目

铅、二氧化铅、氟硼酸（HBF4）电池是一种低温性能优良的电池，常用于军事和国防工业，其总反应方程式为Pb+PbO2+4HBF42Pb（BF4）2+2H2O[已知：HBF4、Pb（BF4）2均是易溶于水的强电解质]．下列说法中不正确的是（ ） A. 充电时，阳极附近溶液的pH增大 B. 充电时，阴极的电极反应式为pb2++2e﹣═pb C. 放电时，转移1mol电子时负极减少的质量为103.5g D. 放电时，正极的电极反应式为PbO2+2e﹣+4H+═pb2++2H2O根据首字母及汉语提示完成单词。1. Tom likes music and he can play they p________ very well.2. My favorite color is y________. 3. My name is Li Ming. "Li" is my f________ name. 4. The little river is b________ my house. My house is in front of it. 5. My p________ are workers. 6. Juice and milk are ________ (健康的) drinks. 7. Her favorite food is ________ (蔬菜). 8. Lucy can play ________ (网球) well, but Betty can't. 9. There are many tall ________ (建筑物) near here. 10. I ________ (练习) my English every day.