A:生物能适应环境
B:生物能影响环境
C:环境能影响生物
D:环境能适应生物
情景交际。(把正确答案的序号写在横线上。)
Bai Ling: I have a monkey.
Wu Yifan: ____May I have a look?
Bai Ling: ____Here you are.
Wu Yifan: ____Oh, it is nice.____
Bai Ling: Thanks.
A: Thank you. B: Sure. C: I like it. D: Really?
使等式x+44-x=x+4-4-x成立的条件是____ 。
—I went there by bus.
下列各图反映的地理现象,主要由外力作用形成的是( )