夏天游泳,()舒服,()凉快扩号中填上合适的关联词语

解题思路：（1）蒸发是一种汽化现象，汽化要吸热；
（2）加快蒸发的办法有：升高液体的温度，增大液体的表面积，加快液体上表面的空气流动速度．

答：夏天游泳后，从水中上岸的人觉得冷，特别是有风吹过来的时候会觉得十分凉爽，这是因为人从水中上岸后，身上有水，水蒸发吸热，所以感觉冷；要是有风的时候，就加快了空气流动速度，加快了蒸发，所以会觉得十分凉爽．

点评：
本题考点： 蒸发及其现象；影响蒸发快慢的因素．

考点点评： 本题考查的是有关汽化现象的知识，解题时要知道汽化的两种方式：蒸发和沸腾；会灵活应用影响蒸发快慢的因素分析问题．

解题思路：（1）蒸发是一种汽化现象，汽化要吸热；
（2）加快蒸发的办法有：升高液体的温度，增大液体的表面积，加快液体上表面的空气流动速度．

答：夏天游泳后，从水中上岸的人觉得冷，特别是有风吹过来的时候会觉得十分凉爽，这是因为人从水中上岸后，身上有水，水蒸发吸热，所以感觉冷；要是有风的时候，就加快了空气流动速度，加快了蒸发，所以会觉得十分凉爽．

点评：
本题考点： 蒸发及其现象；影响蒸发快慢的因素．

考点点评： 本题考查的是有关汽化现象的知识，解题时要知道汽化的两种方式：蒸发和沸腾；会灵活应用影响蒸发快慢的因素分析问题．

解题思路：分析两种现象原来和现在的状态，然后根据熔化和汽化的定义，以及熔化和汽化时吸热和放热情况进行判断．

（1）“夏天吃冰棒觉得凉快”，是利用了冰棒的熔化吸热；
（2）“夏天游泳后上岸被风一吹感到凉快”，是因为水的汽化吸热．
故答案为：熔化吸热；汽化吸热．

点评：
本题考点： 熔化与熔化吸热特点；汽化及汽化吸热的特点．

考点点评： 知道六种物态变化，明确它们的吸、放热情况，是解决问题的关键．

Summer swimming safety can not be ignored(标题)
以下正文;
More hot days,the public swimming pool has become a favored place,leisure Xiaoshu,we can feel good fitness.A pool of blue water,has a lovely,but there is also potential danger.When launched,it is necessary to strengthen self-protection,can not be taken lightly.
Children can not be launched personal,leisure areas and should have his or her parents; swimming beginners should be 1.4 meters below the shallow waters,and not alone in the pool practicing "Bieqi" so as not to choke water accidents,not in shallow water ,The water in the region,"Zha Mengzi" to prevent head impact the bottom or wall are dangerous.
Special needs to be emphasized is that alcoholics do not swim.Because people in the consumption of wine,after dinner,more blood will flow of movement of organs and skin,which will make brain blood supply shortage.And alcoholics in the water to breathe,his head constantly about swing and the head,bow,coupled with wave Dangyangguanru ears,the brain will be to stimulate the vestibular organ,causing dizziness and loss of balance,are dangerous.

解题思路：分析两种现象原来和现在的状态，然后根据熔化和汽化的定义，以及熔化和汽化时吸热和放热情况进行判断．

（1）“夏天吃冰棒觉得凉快”，是利用了冰棒的熔化吸热；
（2）“夏天游泳后上岸被风一吹感到凉快”，是因为水的汽化吸热．
故答案为：熔化吸热；汽化吸热．

点评：
本题考点： 熔化与熔化吸热特点；汽化及汽化吸热的特点．

考点点评： 知道六种物态变化，明确它们的吸、放热情况，是解决问题的关键．

在炎热的盛夏,人们都喜欢去游泳,这样既可以锻炼身体,又可以免遭热浪的袭击.可是凡游过泳的人们大概都会有这样的感觉,尽管外面的天气很热,可是刚从水里出来时会感到很冷,甚至要打一下寒战.
　　为什么会出现这种现象呢?这是因为我们刚从水里出来时, 皮肤表面还带着许多水分,这些水分在蒸发时可以带走人体中的 一部分热量,这样就会使身体的温度下降,人就会觉得冷了.一 般来说,每毫升水分在皮肤表面蒸发时可带走1234千卡热量. 所以人们游泳完从水里出来时,应马上把皮肤表面的水擦干, 这样就不会因为水分的蒸发而带走体内的热量,从而使身体保持 正常的温度.另外,还可以预防人们因着凉而生病.

1 Caution!,must be to the regular place.2,pay attention to sun,slightly rubsunscreen,skin injury can not change color.3,pay attention to the time not too long,because women are there in the environment of wet long soaking time,easy toinfection.4,don't be afraid to cramp,must press the opposite direction,open it,open,pay attention to massage.5,the best swimming suit color is dark,prevent exposed.6,if in the water,we must pay attention to clean.7,according to their own situation,if we want to deep water area,be accompanied by someone,do not act alone.In addition to the people unbearable summer hot summer,swimming is a good way,but swimmingin the summer,it is easy to ignore the safety.So swimming in summer should pay attention to what?First of all,whether in swimming pool indoors or outdoors,beaches,swimming in summer people must be very much,but it is summer,the students all liketo find the feeling of relaxation,in the water.So,this time it should be noted that,in addition,in the water,children playing,very like inflatable toys shapes,although thesetoys more practical,but they are not a life preserver after all,plus play these toysyounger children,whether adult or child in the summer before swimming must take acool summer,first,the outdoor temperature is higher,before launching a little cool,can adjust the temperature,prevent water after cardiac the load is too high; second,can also play a role in sanitation.So,the summer to summer heat,many people oftengo swimming,the lake,the sea,water flow and indoor swimming pool is different,so the more careful,if you are a beginner should be water,if you are a good swimmerbut cautious play outside,should also be equipped.Swimming appliances you.

解题思路：（1）蒸发是一种汽化现象，汽化要吸热；
（2）加快蒸发的办法有：升高液体的温度，增大液体的表面积，加快液体上表面的空气流动速度．

答：夏天游泳后，从水中上岸的人觉得冷，特别是有风吹过来的时候会觉得十分凉爽，这是因为人从水中上岸后，身上有水，水蒸发吸热，所以感觉冷；要是有风的时候，就加快了空气流动速度，加快了蒸发，所以会觉得十分凉爽．

点评：
本题考点： 蒸发及其现象；影响蒸发快慢的因素．

考点点评： 本题考查的是有关汽化现象的知识，解题时要知道汽化的两种方式：蒸发和沸腾；会灵活应用影响蒸发快慢的因素分析问题．