DNA is a linear polymer made up of four different types of monomers. The backbone is built of repeating sugar–phosphate units. What base might be attached to each deoxyribose. ( )
【简答题】完形填空。 I devote myself to music because of my grandmother. My mom and I lived with grandparents from the time I was two until I was eight. And even then, I was at their house before and after school ev...
【简答题】完形填空。 This is Red Star Town. My grandfather has lived here all his life. He 1 my grandmother here and they got married. Red Star Town was called Taping Town before. The government started 2 the wooden...