I. H₂Y^2-与Fe²⁺形成的络合物FeY^2- 可用于吸收烟气中的NO。其吸收原理:

FeY^2- (aq)+ NO(g) $\stackrel{}{\rightleftharpoons }$ FeY^2-(NO) (aq)     △H<0

巴西绝大部分领土位于（ ）

    Hello! I'm John. I'm 1 the classroom. Look! This is a desk. The desk is 2 . 3 is nice. What4 is it? It's orange. My English book and my schoolbag are on it. 5 schoolbag is black. What's in the schoolbag? A book, a pencil box and a watch are in it. What's in the pencil box? There are (有) 6 pencils. One pencil is red 7 two pencils are yellow. Where is my key? My key is 8 . It isn't in my schoolbag. Is it on the desk? 9 , it isn't. I must find it. Please 10 me if(如果) you found it. My telephone number is 62718568.