题目

I sat down to read under an old tree in the park. I felt my life was  1  , for my whole world was dark. A young boy ran up to me, out of  2  . He stood right before me with his head down and said excitedly, “Look what I found! ” In his hand was a flower, and what a poor sight! The flower was dry and  3  . I gave him a small smile and then turned my eyes away so that he could take his dry flower and go off to play. However, he sat next to my side and placed the flower to his  4  and said in surprise, “It smells sweet and it’s beautiful, too. That’s why I picked it. Her为了消除人体碘缺乏病，我国政府规定食用盐必须是加碘食盐．所谓碘盐就是在食盐中加入一定量的碘酸钾（KIO3）．计算（精确到0.1）：（1）碘酸钾中碘元素的质量分数．（2）若成人每天食用7g食盐，从中摄取0.15mg碘，那么1kg碘盐中含碘多少mg．