世界上有近一半的人信仰宗教，____ 、____ 和____ 是世界的三大宗教．

a、b、c、d为短周期元素，a的M电子层有1个电子，b的最外层电子数为内层电子数的2倍，c的最高化合价为最低化合价绝对值的3倍，c与d同周期，d的原子半径小于c．下列叙述错误的是（   ）

给下列图片排序。    There are some special days in a year.New Year's Day is in January.Then Tree Planting Day comes after Women's Day.Children like June best.Because Children's Day is in June.Dragon Boat Festival (端午节) always comes after Children's Day.I like Children's Day，because I can play many games and get some gifts from my parents on that day.In September we have Teachers' Day.And in October，we have China's National Day.
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已知X、Y、Z三种金属，它们之间存在下列反应①X+H₂SO₄═XSO₄+H₂↑    ②Z+YSO₄═ZSO₄+Y   ③Y、Z与H₂SO₄ 不发生反应．请你选择它们的活动性顺序表示正确的是（   ）

tiger