（3分）（1）在日常生活中应注意合理摄取营养物质和人体必需的元素。有些青少年不爱吃蔬菜、水果，影响生长发育，这主要是由于摄入           不足而引起的。

（2）波尔多液是一种农业上常用的杀菌剂，它是由硫酸铜、石灰加水配制而成，为什么不能用铁制容器来配制波尔多液？用化学方程式表示：

                                                           。

（3）“低碳生活”倡导低能量、低消耗，主要是为了减少        （填化学式）的排放量。

短文改错　（每小题1分，满分10分）

We are now living in an information world that TV, cell phones and the Web are wide used. It seems that many people can not enjoy them without them. However, if I had to give up one of them, I will turn off the TV rather than switch off my cell phone and cut off the Internet. I could do without TV because few show take my fancy and there’re too many commercials. Besides, most programs on the TV are also available elsewhere. As for cell phones and the Web, they are more necessarily to me. I need a cell phone to keep touch with my friends and family, and almost all information can be gather on the Internet.