【单选题】—China is a great country. —Yes. Great changes ______ in China in the last thirty years. [ ]
【多选题】有关生物电子等排体原理的叙述正确的是
C.
- CH2 - , - NH - , - O - . - S -为生物电子等排体
D.
生物电子等排体会产生相似,相关或相反的生物活性
【单选题】They have rich and beautiful forests _____ in the south of the country.
【简答题】__________ pollution is the key to__________the country a comfortable and clean place to live in.
【单选题】藏族舞动的基本体态:含胸、踏腰、懈胯、 。
【简答题】What are the reservations made by our country to the Convention on Diplomatic Relation of Vienna? Please give your comments.