A:Yes , she does .
B:No , I am not .
C:Yes , I do .
I usually get up ____ 7: 00.( )
已知⊙O的半径为R,点O到直线m的距离为d,R、d是方程x2﹣4x+a=0的两根,当直线m与⊙O相切时,a= ____.
请将如图所示各仪器的读数填入相应的空格处:
温度计读数 ____ ℃,物块重力 ____ N,纪念币直径 ____cm,电阻箱读数 ____ Ω.
-- Do you know ______ our Chinese National Symbol of Day (国家公祭日) is?
-- Yes, it's on December 13th. It's in memory of the people_____ were killed in Nanjing Massacre.