我国最大的内流河是( )
A:长江
B:塔里木河
C:湟水
D:黄河
某校九年级两个班各为玉树地震灾区捐款1 800元,已知2班比1班人均捐款多4元,2班的人数比1班的人数少10%,求两个班人均捐款各多少元?
计算:(5)2=____
My brother would like to buy a good watch but_______ was available from that shop.