能供给呼吸的是____；可用于填充载人飞艇的是____；

植物进行光合作用吸收的是____；

用于仓库里储存粮食的气体是____；引起酸雨的气体是____。

甲、乙、丙三个人在射击比赛中每人射击了3次，图上的黑点是他们击中的弹孔.知道他们每人得了15分，可是记分员忘记了击中靶心(10环)的是谁，只记得第一次射击甲得8分(按1环为1分计算)、乙得3分、丙得2分.小朋友，你能根据靶上弹孔的情况，判断出击中10环的是____。

    Do you know how to study in a right way?The following are the ways of studying．

    First，the best time for reading is morning，because in the morning，the air is fresh and the mind is clear．For that reason，we can get good result．

    Second，in studying we must have patience．If we have not known a text well，we must read it again．We should not read the next one until we have learned the first one．

    Third，when we are studying，we must put our hearts into the book，or we can get nothing from the book while we are reading．

    At last，we must always ask“whys”．If we don't understand something well，write it down and ask our teachers or our parents for help．In any possible way,we must know it completely and what we've learned can be used well and made better.

    Though there are many ways for studying，yet the above mentioned will be quite enough if we can keep them in heart and do so．

如图是一种简易的食物保存方法，下列叙述不合理的是（    ）