题目

阅读理解 Dear Mary,        Thank you for your last letter in December. I’ll tell you something about my family.        My brother Jerry is a tall and cool boy. He has short straight hair. At school , he is the captain of the volleyball team. He is very popular. At home, He is very smart and funny. He often tells funny stories and makes us happy.        I have two sisters, Lily and Lucy. They are twins. They look the same. They both have long blonde hair and big eyes. But in some ways, they are different. Lily sings well and she also likes writing very much. But L下列说法中，不正确的是                                            A．稀释浓硫酸时，应将浓硫酸缓慢注入水中，并不断地搅拌B．测某溶液的pH，用玻璃棒蘸一滴待测液到干燥的pH试纸上，跟标准比色卡对照C．把碳酸氢铵和农家肥料草木灰（碱性）混合使用，会降低肥效D．不慎将浓酸溶液沾到皮肤上，立即用大量水冲洗，再涂上3-5%的氢氧化钠溶液