题目

p{font-size:10.5pt;line-height:150%;margin:0;padding:0;}td{font-size:10.5pt;} ( 08鄞州中学限时训)X、Y、Z、W为按原子序数由小到大排列的四种短周期元素。已知：① X可分别与Y、W形成X2Y，X2Y2、XW等共价化合物；② Z可分别与Y、W形成Z2Y、Z2Y2、ZW等离子化合物。请回答：(1)Z2Y的化学式是                。(2)Z2Y2与X2Y反应的化学方程式是                                    。(3)如右图所示装置，两玻璃管中盛满滴有酚酞溶液的ZW饱和溶液，C（I）、C（— I waited for David for a long time but he didn't come along. Do you know what happened to him?— He has been under the weather because he played football in the rain yesterday.A.come outB.come acrossC.show up