若m =2125,n =375,则m、n的大小关系正确的是( )
A:m >n
B:m <n
C:m =n
D:大小关系无法确定
读人地关系演变阶段图,完成下列问题。
A: Excuse me! ____
B: Yes. Please keep your desk clean.
A: ____
C: Wow! Your picture is so beautiful!
B: ____
C: Oh, I'm sorry. ____
B: Sure!
C: ____
B: Yes, work quietly.
A. Can I write my diary here?
B. May I use your pencil?
C. Anything else?
D. OK. I will.
E. Be quiet, please!
能作为监测空气污染程度的指示植物( )
①应尊重规律的客观性,按规律办事 ②应发挥主观能动性,创造新的规律
③要尊重自然、保护自然,与自然和谐共处 ④要利用规律,治理污染造福人类