根据录音,选择合适的答案() 查看材料
A. On every continent but not in every country.
B. On the continents with developed countries.
C. On the continents with developing countries.
D. On every continent and in every country.
细胞凋DNA 链断裂的主要部位是()。
A. 富含AT的区域
B. 富含GC的区域
C. 核小体之间的连接
D. 已经发生DNA损伤的部位
E. DNA的任何区域
根据录音,选择合适的答案() 查看材料
A. Talk with confident people.
B. Set up achievable goals.
C. Be aware of your achievements.
D. Award yourself more frequently.
机体中寿命最长的细胞是()。
A. 红细胞
B. 表皮细胞
C. 白细胞
D. 上皮细胞
E. 神经细胞