题目

用方框中所给单词的适当形式填空，每词仅用一次（每空一词）。coffee   between   spare    two   waste    1．My classmates and I like to go hiking in our ________ time. 2．Aunt Li never________ money on things that she doesn’t need. 3．Scientists report that it’s better to smell________ than to drink it. 4．It is known that Mother’s Day is the ________Sunday of May. 5．Turn left and you will see the library________ the bank and the supermarket.下图表示有关蛋白质分子的简要概念图，对图示分析正确的是 A．甲中一定含有S、P等元素       B．①处发生的过程是脱水缩合 C．多肽中乙的数目等于丙的数目   D．蛋白质结构的多样性是细胞多样性的根本原因