【单选题】—Thank you very much. —_____. [ ]
【多选题】一个 DNA 分子由许多个单核苷酸组成。每个核苷酸由磷酸、脱氧核糖和碱基构成。碱基有 ( )。
【简答题】DNA是人类进行亲子鉴定的主要依据,它是由脱氧核糖、磷酸和碱基组成。( )
【简答题】DNA是人类进行亲子鉴定的主要依据,它是由脱氧核糖、磷酸和碱基组成。( )
【单选题】—My grandmother died last night. I'm very sad about it. —________. [ ]
C.
I 'm very sorry to hear that
D.
I hope you 'll feel better soon.
【判断题】DNA是人类进行亲子鉴定的主要依据,它是由脱氧核糖、磷酸和碱基组成。 ( )
【单选题】—You're very _____ , aren't you? —Yes. Our team has won the game . [ ]