This is a photo of her ______. [ ]
A. home
B. house
C. family
D. families
答案：C
益火之源，以消阴翳
井斜角重复曲线与主曲线重复误差不能超过（）。
A.±1°
B.±0.5°
C.±0.2°
D.±2°
