2020 Shanghai Question 1 Single-choice Differentiating 2020_上海 Paper 1.“芳林新叶催陈叶,流水前波让后波”,新叶中叶绿素的合成必须含有的离子是( ) A. $\mathrm { M g ^ { 2 + } }$B. $\mathrm { F e ^ { 2 + } }$C. $Z \mathrm { n ^ { 2 + } }$D. $\mathrm { C a ^ { 2 + } }$ Answer keyA ☆ SaveCan't do it, show the explanation查看原卷 →