A. 酰亚胺基团 B. 丙二胺基团 C. 乙二胺基团 D. 酰肼基团 E. 酰胺基团
A B C D E
A. 溶出原理 B. 扩散原理 C. 溶蚀与扩散相结合原理 D. 渗透泵原理 E. 离子交换作用原理
A. By spending less on health care. By feeding less people. C. By having more work labors. D. By receiving more donations.