- Junior high school days will be over _______ a week. How are you feeling?
- I'm trying to keep my cool because we've been together ________ three years.
A:in; in
B:for; in
C:in; for
D:for; for
下列自然资源选项中哪些是可再生资源,哪些是非可再生资源,选择正确的写在相应的横线上,并说出理由。
①花岗岩 ②温泉 ③树木 ④草地 ⑤核能 ⑥藏羚羊 ⑦风能 ⑧天然气