【简答题】五位同学围成一圈依次循环报数,规定:第一位同学首次报出的数为1,第二位同学首次报出的数为-2,第三位同学所报出的数是前第二位同学所报出数与第一位同学所报出数的差,第四位同学所报出的数是前第三位同学所报出数与第二位同学所报出数的差,以此类推,则前100个被报出的数之和为_________.
【简答题】植树节时三位同学去种树,第v位同学种树k棵数是其f同学种树总数k 1 2 ,第二位同学种树k棵数是其f同学种树总数k 1 4 ,第v位同学和第二位同学共种了81棵.三位同学v共种了多少棵树?
【单选题】在(),导游领队应将文明旅游事项向旅游 者进行重申。
【单选题】下课后教室里最后还剩下2位男同学和2位女同学,四位同学先后离开,则第二位走的是男同学的概率是( )
【简答题】Thir, for me, was a challenging year. My parents divorced and I moved to a new town with my f ather, far from my old family and friends. I was terribly lonely mad and would cry myself to sleep eac...
【简答题】阅读理解。 My Family I have a happy family. There are five people in my family. My father is tall. And he is thin. My mother is short. She loves me very much. She likes going shopping. My grandfather and g...