问题
判断题
双硫腙比色法测定铅的灵敏度高,故所用的试剂及溶剂均需检查是否含有铅,必要时需经纯化处理。
答案
参考答案:对
双硫腙比色法测定铅的灵敏度高,故所用的试剂及溶剂均需检查是否含有铅,必要时需经纯化处理。
参考答案:对
根据短文内容,从下框的A--F 选项中选出能概括每一段主题的最佳选项,选项中有一项为多余项。
小题2:Some children have always complained that their parents are out of touch with modern ways; that they do not trust their children to deal with crises; that they talk too much about certain problems and that they have no sense of humor, at least in parent-child relationships. Actually, this happens as a result of misunderstanding because loving the young is the nature of all the parents. 小题3:Young people often get their parents annoyed with their choices in clothes and hairstyles, in idols (偶像)and music, but that is not their desire. They feel cut off from the adult world into which they have not yet been accepted. So they create a culture and society of their own. Then, if it turns out that their music or idols or clothes or hairstyles annoy their parents, this gives them additional enjoyment. They may think that they are leaders in style and taste. 小题4:Sometimes you are satisfied if your parents don’t approve of what you do. You may think that they do so for your sake. They tend to bring their children under control just because they want to be responsible for their children. On the contrary, you’ll be sad if they let you do everything in your own way. That will make you think they don’t care about you. 小题5:If you plan to control your life, you are supposed to communicate with others in a more effective way. You can charm others, especially your parents, into doing things the way you want. You can impress others with your sense of responsibility, so that they will give you the authority to do what you want to do. |