The new supermarket in our town for two weeks, but I there yet.
A:has opened; haven't gone
B:has been open; haven't been
C:has been open; haven't gone
D:has opened; haven't been
“春秋时代灭国在六十以上,但其中大部分是以夷灭夏,和以夏灭夷。诸侯国之间相灭的只占少数,姬姓国相灭的例子更是少数。而在列国内部,大夫固然有时逐君弑君,却还要找一个比较合法的继承者来做傀儡。”材料中的这种现象最能反映( )
质量为4kg的物体以2m/s的初速度做匀变速直线运动,经过2s动量的大小变为14kg·m/s.该物体( )
下列组合搭配中正确的是( )