本模数是模数协调中选用的基本单位，其数值为（）组成。
A.300mm
B.100mm
C.200mm
D.50mm
参考答案：B
Her son, to whom she is so _____ , went abroad last year, leaving her alone in the small village. [ ]
A. loved
B. cared
C. devoted
D. affected
