非编码链(anticoding strand)和编码链(coding strand)

A. They can be good friends．
B. They are humorous．
C. They are never serious．
D. They like playing jokes．

A. In a restaurant，
B. In a hotel．
C. In a supermarket．
D. In a greengrocer"s．

A. They have the same friends．
B. They have different ideas about people．
C. They have the same characteristics．
D. They like changes in their lives．

A. He has a pain in the neck．
B. He listens to music while sleeping．
C. He cares little about other people．
D. He is fed up with the man．