题目

危害学生健康的因素有很多。请你根据以下提示以How to keep healthy为题,写一篇不少于80词的英语短文。提示:1).列举危害学生健康的因素,如吃快餐食品、打电子游戏和缺乏睡眠; 2).列举保持健康的具体措施。How to keep healthy 答案:One possible version:How to keep healthy Many students have health problems.Why?First,most students like fast food,but it's bad for health.Second,many boys like playing video games,but it's bad for eyes.Third,many students don't have enough sleep,so they often feel tired. What should students do to keep healthy?First,eat more healthy food,such as fruit and vegetables.Second一女性患有某种单基因遗传病。某同学对其家系的其他成员进行调查后,记录如下(“+”代表患者,“一”代表正常)。下列有关分析错误的是 祖父 祖母 姑姑 外祖父 外祖母 舅舅 父亲 母亲 弟弟 - + - + - - + + - A.该遗传病属于常染色体隐性遗传病   B.调查该病的发病率应在自然人群中随机取样调查计算   C.该患病女性的父母生一个正常孩子的概率为1/4   D.这个家系中所有患者基因型相同的概率为4/9
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