【简答题】试比较两类核酸的化学组成、分子结构、分布及生物学作用。
【单选题】— Why is she absent? — She's absent ___________ she is ill. [ ]
【单选题】— Happy New Year, Miss White. — _________________ [ ]
【判断题】friends = ['Joseph', 'Glenn', 'Sally'] for friend in friends: print( 'Happy New Year:', friend) print (’Done!”) 我们将得到: Happy New Year: Joseph Happy New Year: Glenn Happy New Year: Sally Done!
【简答题】—Happy New Year! —______________ A.Happy New Year! B.Oh, no, thanks. C.Wish you, too. D.It ’s the same to you.
【简答题】试比较两类核酸的化学组成、分子结构、分布及生物学作用
【简答题】核酸的基本结构单位是 。核酸根据化学组成可分为 和 两大类。
【单选题】— Happy New Year, Mr Li! — _________________ [ ]