《九章算术》是我国古代内容极为丰富的一部数学专著,书中有如下问题:今有女子善织,日增等尺,七日共织二十八尺,第二日,第五日,第八日所
每年都有许多动物因____________塑料而死亡。海洋中的塑料垃圾不仅危及____________的生存,还会缠绕在海轮的____________上,造成____________。
(16)毛泽东在《送瘟神》中写道:“坐地日行八万里.”又知地球的体积大约是火星的8倍,则火星的大圆周长约为 万里.
下列各句中,没有语病的一句是( ) A.终身教育制度的建立,不仅为那些因各种原因未能完成学业的人打开了一扇大门,也为那些对知识有着更高
1937年抗战爆发以后,原来割据一方的地方各派军阀纷纷请缨杀敌,电报如雪片般飞向南京。在整个抗战期间,川军、滇军、晋军、桂军等地方部队奋战
–Can I use your pen? –__________.A.Excuse me. I can’tB.Excuse me. You can’tC.Sorry. I don’t have oneD.Sorry. You don’t have one
— Mary told me she would meet me at yesterday’s party. But she didn’t turn up. — It is a pity that she broke her ________ . A. promise B. heart C. habit D. rule
The early settlers in the jungle didn’t have such advanced equipment _____ we have today to fight against natural disasters and many a time they _____ despair(绝望) but they survived somehow. A.