题目

洗涤在生活、生产中不可缺少。下列洗涤方法中利用了乳化原理的是     A．用汽油洗去手上的油污        B．用洗洁精洗去餐具上的油污     C．用酒精洗去试管中的碘        D．用稀盐酸洗去石灰水瓶内壁的白膜 答案：BMany teenagers feel that the most important people in their lives are their friends. They believe that their family members,  especially their parents,  don’t know them as well as their friends do. In large families,  it is often for brothers and sisters to fight with each other and then they can only turn to their friends for advice. It is very important for teenagers to have one good friend or many friends. Even when they are not with their friends,  they usually spend a lot of time talking among themselves on the phone. This communication is very important in children’s growing up,  because friends can discuss something difficult to say to their family members. However,  parents often try to choose their children’s friends for them. Some parents may even stop their children from meeting their good friends. The question of “choice” is an interesting one. Have you ever thought of the following questions? 　　Who choose your friends? 　　Do you choose your friends or your friends choose you? 　　 　　Have you got a good friend your parents don’t like? 1. Many teenagers think their＿＿＿＿ know them better than their parents do. A．friends　　　　　　　　　　 B．teachers C．brothers and sisters D．classmates 2.When teenagers stay alone, the usual way of communication is to＿＿＿. A．turn to their friends B．talk with their parents C．have a discussion with their family D．talk with their friends on the phone 3.The passage suggests (暗示) that＿＿＿ . A．parents cannot choose friends for their children successfully B．perhaps some children’s friends are chosen by their parents C．children won’t let their parents choose friends for them D．parents often try to choose their children’s friends for them 4.Which of the following do you think is RIGHT according to the passage? A．Parents should like everything their children enjoy. B．In all families, children can choose everything they like. C．Parents should try their best to understand their children better. D．Teenagers can only turn to their friends for help.