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    Developing healthy eating habits starts from childhood, therefore it is important for parents to teach and provide children with a healthy diet. DPHSS administrator of the Bureau of Nutrition Services, Charlie Morris told KUAM News, “A healthy diet for a child consists of a lot of fruits and vegetables in the diet limiting the amount of simple sugars in the diet and high fat food and highly processed food.”

    This means staying away as much as possible from food such as chips, cookies, candies and sugary drinks, as all children need to have meals which involve a well-balanced diet. Community nutritionist Thelma Romoso said, “The fruit, the vegetable, the grain, the protein, and also the milk, the diary product, so for the fruits it's easy for a mother to go into the two plus three concept of fruits and vegetables or five a day.”

    This concept means that there are at least two servings of fruits a day, three servings of vegetables a day which can be served for lunch and dinner. As for protein parents can make a variety of dishes from chicken, beef, fish or even dried beans to pledge the child gets three servings a day.

    Morris said that the child's hunger level controls how much is eaten and the parent controls what and when the meal is offered, saying, “Mom needs to ensure that the food offered is good food for the child to eat and throughout the day depending on how active they are, snacks are not a bad thing, so the mom should offer good kinds of snacks.”

    When it comes to preparing your child's lunch and snacks for school, make sure to keep in mind that the food you provide should not only be a source of energy but also be nutritionally beneficial such as fresh fruits, and whole grain bread. But parents must be sure to remember that a good nutritional diet must be balanced with physical activity, namely it is important that children get outside and run around and play and get activity in addition to eating a good diet.

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中科院大气研究所研究员张仁健课题组与同行合作,对北京地区PM2.5化学组成及来源的季节变化研究发现,北京PM2.5有6个重要来源,其中,汽车尾气和燃煤分别占4%、18%(如图1所示)

(1)用于净化汽车尾气的反应为:

2NO(g)+2CO(g)2CO2(g)+N2(g)

已知该反应在570K时的平衡常数为1×1059,但反应速率极慢.下列说法正确的是:____ 

A.装有尾气净化装置的汽车排出的气体中不再含有NO或CO

B.提高尾气净化效率的常用方法是升高温度

C.增大压强,上述平衡右移,故实际操作中可通过增压的方式提高其净化效率

D.提高尾气净化效率的最佳途径是使用高效催化剂

(2)CO对人类生存环境的影响很大,CO治理问题属于当今社会的热点问题.镍与CO反应的化学方程式为Ni(s)+4CO(g)⇌Ni(CO)4(g),镍与CO反应会造成镍催化剂中毒.为防止镍催化剂中毒,工业上常用SO2除去CO,生成物为S和CO2.已知相关反应过程的能量变化如图2所示:

则用SO2除去CO的热化学方程式为____ 

(3)NH3催化还原氮氧化物(SCR)技术是目前应用最广泛的烟气氮氧化物脱除技术.发生的化学反应是:2NH3(g)+NO(g)+NO2(g)2N2(g)+3H2O(g)△H<0.为提高氮氧化物的转化率可采取的措施是(任意填一种)____ 

(4)利用ClO2 氧化氮氧化物反应过程如下:

反应Ⅰ的化学方程式是2NO+ClO2+H2O═NO2+HNO3+2HCl,反应Ⅱ的离子方程式是____ .若有11.2L N2生成(标准状况),共消耗NO____  g.

(5)化学在环境保护中起着十分重要的作用,电化学降解法可用于治理水中硝酸盐的污染.该方法可用H2将NO3还原为N2,25℃时,反应进行10min,溶液的pH由7变为12.其原理如图3所示.

电源负极为____ (填A或B),阴极反应式为____ ;若电解过程中转移了2mol电子,则质子交换膜左侧极室电解液的质量减少____ 克.