题目

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Every time you visit Disney World,there's something new to see. What began in 1971 as the Magic Kingdom now includes the high­tech,movie­mad Disney and Animal Kingdom. Each time the park expands,so do your chances to spend money. How can you save?As a family guide to Disney World,I've been to the park more than 25 times with my kids,and I've developed a few money­saving plans.   Even if you're visiting for fewer days,it's a deal( 下列叙述中,正确的是 A.R+具有和氖原子相同的电子层结构,则与该离子电子数相同的粒子,至少有四种以上 B.X与X2+是某元素的不同存在状态,其粒子具有相同的电子层数和质子数 C.a、b两种粒子的质子数不同,电子数相同,则两者可能是两种不同的分子或不同的原子 D.非金属元素的原子在化学反应中不一定都失去电子
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