A:所得溶液呈无色
B:最后得到的溶液中一定含有Cu2+
C:将残余固体加入到稀H2SO4中,有气泡产生
D:最后得到的溶液中可能含有Fe3+
秦朝修建都城咸阳,把渭河比作银河“天汉”,把各座宫殿比作星座,咸阳宫居中,四周有许多通道,形成众星拱辰,屏藩帝都的格局。这在本质上反映当时( )
is called the "Floating City" in the world.
A:What day is it today?
B:It's ____.
A:What lessons do you have?
B:I have ____ and ____ .