译文:“现在有一种野兽,长有六头四足;有一种鸟,长有四头两足,把它们放一起,共有76头,46足.问野兽、鸟各有多少只?”设野兽x只,鸟y只,可列方程组为____.
2009年,海协会、海基会两会领导人第三次会谈在南京举行。“两会”曾就“海峡两岸均坚持一个中国原则”达成共识的时间是( )
Microsoft ended support for Windows XP after April 8, which _______a major operating system for some Chinese computer users, and advised users to upgrade to Windows 8.1.
制作馒头要用一种微生物,它是( )