【简答题】Fred: When do you usually have your computer class?Jane: ______.
【单选题】具有5′-CGGTA- 3′顺序单键的DNA与下列那种RNA杂交: ( )
【简答题】J____ a minute. (=Wait a minute.)
【单选题】—Miss Sun has taught_____ Chinese for about 10 years. —You are lucky. _____ is a very good teacher.
【单选题】Wait a minute! The headmaster has to tell you.
【单选题】具有5′ -CGGTA-3′顺序的单链DNA能与下列哪条RNA链互补?