根据录音,选择合适的答案() 查看材料
A. The woman"s school choir.
B. The man"s experience of singing.
C. The man"s interest in singing.
D. The woman"s talent for singing.
α螺旋是在位置比较接近的氨基酸残基之间通过什么键维系的()。
A. 肽键
B. 疏水键
C. 氢键
D. 酯键
E. 离子键
非编码链(anticoding strand)和编码链(coding strand)
根据录音,选择合适的答案() 查看材料
A. They can be good friends.
B. They are humorous.
C. They are never serious.
D. They like playing jokes.