根据汉字或所给的首字母,完成下列句子 1.My __________(字典,词典) is in my schoolbag. 2.She is sitting in a _______(椅子)。 3.My _______(钥匙) are on the table. 4.Is this your __________(戒指)? 5.I don't know his t_________ number. 答案:1.dictionary 2. chair 3. keys 4. ring 5. telephone由n个碱基组成的原核生物基因,控制合成由1条多肽链组成的蛋白质,氨基酸的平均分子量为a,则该蛋白质的分子量最大为
A.
na/6
B.(na/3) -18(n/3 -1)
C .na-18(n-1) D.
na/6 -18(n/6 -1)