问题 连线题 Read and match. (读一读，连一连)1. eat 2. go 3. play 4. plant 5. make A. shopping B. sports C. breakfast D. a snowman E. trees 6. have English class 7. do morning exercises 8. National Day 9. of course 10. Don't worry. F. 晨练 G. 国庆节 H. 别担心 I. 上英语课 J. 当然 答案
2NH3(g) ΔH＜0
CO(g) ＋ H2O(g) ΔH＞0