题型:补全对话,情景问答 Look, choose and write. 根据图意,从右列的选项中选出合适的句子来完成每组对话。( )1. A:Hello! How are you?B: A. Yes, it is.( )2. A: B: You are 1.5 meters tall. B. I am fine, thanks.( )3. A: B: I go to school by bicycle. C. How do you go to shcool?( )4.A: Is this your pencil?B: D. How tall am I? ( )5.A: When is your birthday? B: E. My birthday is in June. 查看答案
题型:选择题 分类是化学学习和研究的常用手段。下列分类依据和结论都正确的是 A.H2O、HCOOH、(NH3)2Fe(SO4)2均含有氧,都是氧化物B.HCl、H2SO4、HNO3均具有氧化性,都是氧化性酸C.赤铁矿、磁铁矿、黄铁矿、孔雀石都是常见的铁矿石D.Na2CO3、Ba(OH)2、NH4Cl、Na2O2都属于离子化合物 查看答案