问题
选择题
| Leo likes _____, but he doesn't like _____ now. |
| A. hike; hiking B. hikes; hiking C. hiking; to hike D. hiking; hiking |
答案
答案：C
搜题请搜索小程序“爱下问搜题”
| Leo likes _____, but he doesn't like _____ now. |
| A. hike; hiking B. hikes; hiking C. hiking; to hike D. hiking; hiking |
答案：C
2NH4+ + SO42-
2H+ + CO32-