A:x≤12
B:x<12
C:x≥12
D:x>12
— Can you believe _________ little children can finish the difficult problem in _________ a short time?
— I can't believe it until I see it with my own eyes.
设集合A=x|1≤x≤2,B=x|x≥a,若A⊆B,则a的范围是( )
I still see her _____________ after our graduation from college.
我国下列省级行政区中,受寒潮影响较小的是
元朝在澎湖岛设置了____,负责管辖澎湖和琉球,这是历史上中央王朝首次在____地区正式建立的行政机构。