已知三个连续正整数的倒数和等于191504,则这三个数之和是______. 发布时间:2017-06-07 16:08 │ 来源:www.tikuol.com 题型:填空题 问题: 已知三个连续正整数的倒数和等于191504,则这三个数之和是______.
题型:填空题 .It is reported that two schools,_______fell into ruins in the earthquake, are being rebuilt and will be open next term.A.they bothB.both of whichC.which bothD.both of them 查看答案
题型:填空题 改变内能有不同的方式,图甲是在一个配有活塞的厚壁玻璃筒里放一小团蘸了乙醚的棉花,当迅速压下活塞时,可看见筒内棉花燃烧起来.这是通过______方式使玻璃筒内的空气______增加,温度升高,达到棉花的燃点,使棉花燃烧.图乙是通过______方式把试管里的水加热至沸腾. 查看答案