—How was your climbing Mount. Huang?
—I didn't believe I could do it ___________ I got to the top.
A:until
B:while
C:after
使用电火花计时器在纸带上打点时,合理的操作顺序应该是( )
在抵抗元朝统一过程中的英雄人物是( )
下列关于眼睛瞳孔的描述中,正确的是( )