我国地势最高的盆地____ ,这里的矿产及石油资源储藏量也都非常可观.又有“聚宝盆”之称.
In our school library there ____________ a number of books on science, and in these years the number of them ____________ growing larger and larger.
修改错字。
面面具到____ 遍遍起舞____ 厉厉在目____
峦峦不舍____ 蹈蹈不绝____ 承承日上____
求未知数x的值.
7+0.7x=105; 4:2.5= 12x .