题目

关于氮气的性质的说法中，错误的是（） A . 氮在自然界中既以游离态存在又以化合态存在 B . 通常情况下，氮气性质很不活泼 C . 在反应3Mg＋N2=Mg3N2中N2作氧化剂 D . 放电条件下可与氧气反应生成二氧化氮 答案：D 短文改错 　　 　I just had a baby． 　　 He's a beautiful baby boy made up 　　 　　 white cloth with big eyes, nose and mouth, I had  　　 　　 (1) ______ 　　 　　 thought it would be interesting to have a baby, but  　　 　　 (2) ______ 　　 　　 now that I have the little one, so I even want  　　 　　 (3) ______ 　　 　　 to send him back． I have carry him around  　　 　　 (4) ______ 　　 　　 school all day and he was not light． He has a  　　 　　 (5) ______ 　　 　　 sandbag for extra weigh so he looks like a  　　 　　 (6) ______ 　　 　　 real boy． All of my friend love him and always  　　 　　 (7) ______ 　　 　　 want to have a look, so usually I let them watch for  　　 　　 (8) ______ 　　 　　 him during the day． Carry this baby around  　　 　　 (9) ______ 　　 　　 is supposed to teach me the responsibility（责任）of  　　 　　 (10)______ 　　 　　 a parent, but really all it's taught me is how heavy babies are．