依题意得: {2(2x+5y)=36
“黄沙百战穿金甲,不破楼兰终不还。”这是唐诗中的名句。然而楼兰古国在唐代以前已销声匿迹,留下了千古之谜。楼兰国的兴盛在很大程度上得益于
The teachers hope all of us hand ________ our homework ________ time every day.
设a1,a2,a3,a4是各项为正数且公差为d(d≠)的等差数列
猜一猜
很字两人离,木棍左边立。____