题目

Father’s Day is the third Sunday in June. It is a day to thank fathers. On that day, fathers usually receive greeting gifts and cards. On the cards, children will write, “Thanks, father.” “Best wishes for Father’s Day” and so on. Father’s Day is also a day families get together at home as well as in the restaurants. Where does the idea for the holiday come from? We should thank an American. In 1909 she wrote letters to some important persons. In her letter she advised to make Father’s Day on the third Sunday in June. In June in 1910, people celebrated the first Father’1．下列实验中一般没有明显放热现象的是（　　）A．生石灰与水混合B．烧碱溶于水C．浓硫酸稀释D．熟石灰溶于水