Every school has its own rules. How many1 are there in your school? At some schools, the students2to wear uniforms on school days. But many students don't want to wear the school uniforms. They think the uniforms are the ugly3. But the school doesn't allow students to wear4own clothes at school. So some students draw cartoons or other famous singers on their5. They think it is very6 that all the students wear the same. It isn't very good that teachers and students are wearing7 . But most of the students8the rules. What do you think9? Do you10your school uniforms?

关于地轴的说法，不正确的是（　　）

人患急性胃肠炎，造成严重缺水的最主要原因是（   ）

方案甲：员工最多有两次抽奖机会，每次抽奖的中奖率均为 $\frac{4}{5}$ ，第一次抽奖，若未中奖，则抽奖结束，若中奖，则通过抛一枚质地均匀的硬币，决定是否继续进行第二次抽奖，规定：若抛出硬币，反面朝上，员工则获得500元奖金，不进行第二次抽奖；若正面朝上，员工则须进行第二次抽奖，且在第二次抽奖中，若中奖，则获得1000元；若未中奖，则不能获得奖金．

方案乙：员工连续三次抽奖，每次中奖率均为 $\frac{2}{5}$ ，每次中奖均可获得奖金400元．

（Ⅰ）求某员工选择方案甲进行抽奖所获奖金X（元）的分布列；

（Ⅱ）试比较某员工选择方案乙与选择方案甲进行抽奖，哪个方案更划算？

（Ⅲ）已知公司共有100人在活动中选择了方案甲，试估计这些员工活动结束后没有获奖的人数．