题干
根据对话内容，从方框中选择恰当的选项补全对话，其中有两项多余
A: Linda, are you free this evening?
B: Not really! Why?
A: Some of our classmates are coming to my home for dinner. ____
B: I' m afraid not. ____
A: At about eight o' clock.
B: ____
A: What about half past six?
B: Oh, I promised my brother I would help him with math at that time.
A: ____
B: But I will come over to your house next time.____
A: You're welcome.
A. Sure, I'd love to. B. Can you come, too? C. OK, you are really busy. D. But when will the dinner start? E. I' m going to your house by bike. F. Thank you very much for asking me. G. Oh, sorry, I have a violin lesson at that time. |
答案(点此获取答案解析）
B,D,G,C,F
2NH3 ΔH<0的速率—时间图象，则t1时刻使平衡发生移动的原因是
