当土壤中含____ 过多，超过土壤的____能力时，就会引起土壤的 ____、 ____和功能方式变化，微生物活动受到抑制，有害物质或其分解产物在土壤中逐渐____，间接被人体____，达到危害人体健康的程度，就是土壤污染。

⑴What's the baby doing?____                A. No, I don't.

⑵What are you interested in?____          B. It is smiling

⑶Do you have many dolls?  ____            C. Yes, I'd like something to eat.

⑷Are you hungry?____                            D. Thank you!

⑸What a nice picture card!____              E. I'm interested in making kites.

已知函数f（x）满足f（x﹣1）=﹣f（﹣x+1），且当x≤0时，f（x）=x³，若对任意的x∈t，t+2，不等式f（x+t）≥2$\sqrt{2}$f（x）恒成立，则实数t的取值范围是____ 

下列各句中划线的成语使用恰当的一句是（    ）