The shopping mall _____ very early and it _____ after 10:00 p.m.
A:opens, closes
B:is open, is closed
C:opens, is closed
D:is open, closes
默写李白的《闻王昌龄左迁龙标遥有此寄》。
____ ,____ 。
三角形的三边长分别为6,8,10,那它最短边上的高为( )