∵实数a在数轴上对应的点到原点的距离等于19,
∴|a|=19,
∴a=±19.
故答案为:±19.
On July 5, violent crimes of beating, looting and burning in Urumqi of Xinjiang broke out,______ 156 innocent people and with more than 1080_______.
A.killed; injured
B.killing; injured
C.killed; injuring
D.killing; injuring
粟丘疹的临床特点为()
A.皮损好发于眼睑周围,为黄白色坚实性丘疹
B.原发性皮损和继发性皮损临床上可以区分
C.原发性皮损好发于双下眼睑
D.继发性皮损好发于双下眼睑
E.继发性皮损好发于胫前