题目

按官能团分类，下列说法正确的是                                        （    ） A． 属于芳香化合物          B． 属于羧酸 C．CH3－属于醛类          D． 属于酚类 答案：BComplete the sentences with the given words in their proper forms (用括号中所给单词的适当形式完成下列句子，每空格限填一词）【1】A survey shows work six hours on average on weekdays. (German)【2】He was excited that amazing performance in the game attracted people’s attention. (he)【3】We still need more assistants for the teen center library. (second).【4】My father told me that he was tired because of the of the lecture. (long)【5】In years, Alipay has become more and more popular all over the world. (recently)【6】Hardworking children are more likely to in the future. (success)【7】Are the doors locked? (secure)【8】To live happily, please close the door on experiences in your memory. (happy)