A:more quickly
B:more loudly
C:happily
D:sadly
关于生态系统稳定性的叙述正确的是 ( )①负反馈调节是生态系统具有自我调节能力的基础②“遭到破坏,恢复原状”属于抵抗力稳定性③人们对自然生态系统的“干扰”不应超过其抵抗力稳定性④热带雨林在遭到严重的砍伐后,其恢复力稳定性依然很强
What is it? ____
Do you want to be Robin's friend? 你想成为Robin的朋友吗?试着给Robin写封信吧!
Dear Robin,
I want to be your friend. I am a ____. I'm ____ years old. I can ____.I can ____. But I can't ____. Can I be your friend? Please tell me! Thank you.
____
有的人认为,人生苦短,应该及时行乐,这样才人生才过得有意义。( )