设NA代表阿伏加德罗常数的数值。下列有关叙述正确的是
绿色荧光标记的X染色体DNA探针(X探针)，仅能与细胞内的X染色体DNA的一段特定序列杂交，并使该处呈现绿色荧光亮点。同理，红色荧光标记的Y染色体DNA探针(Y探针)可使Y染色体呈现一个红色荧光亮点。同时用这两种探针检测体细胞，可诊断性染色体数目是否存在异常。医院对某夫妇及胎儿的体细胞进行检测，结果如下图所示。下列分析正确的是
将蛙离体神经纤维置于某种培养液中，给予适宜刺激并记录其膜内钠离子含量变化及膜电位变化，分别用图中曲线Ⅰ、Ⅱ表示。下列有关说法正确的是
“Earlytobed，earlytorise”makesamanhealthy,wealthyandwise.It'sgoodforthebody.Thisisanoldsaying.Haveyouheardofitbefore?Itmeansthatwemustgotobedearlyatnight，andgetupearlyinthemorning.Thenweshallbehealthy.Weshallalsoberichandclever.Thatistrue.Thebodymusthaveenoughsleeptobehealthy.Childrenofyoungageshouldhaveenoughsleep，ortheycan'tdotheirworkverywell.Theywillnotbewiseandtheymaynotbecome。wealthy!.Thebodyalsoneedsexercise:walking,running,jumping,swimming,playinggamesandallother。exercise.Exercisekeepsthebodystrong.Exercisealsohelpsthebloodtomovearoundinsidethe.body.Thisisveryimportant.Ourbloodtakesfoodtoallpartsofourbody.Theheadalsoneeds.blood.Exercisehelpsustothinkbetter.
根据短文内容，回答问题.
1.Whatdoes“earlytobed.earlytorise”mean?
2.Whatmustthebodyhavetobehealthy?
3.WhatwillhappentoChildrenofyoungagewhodon'thaveenoughsleep?
4.Whatkeepsthebodystrong?
5.Whattakesfoodtoallpartsofourbody?