It is the teacher _____taught me when I was a child _____ I'm going to visit.[ ]

A. that, which  

B. who, that

C. who, which

D. whom, that

形位公差代号包括（）。

A.形位公差特征项目符号

B.形位公差框格

C.形位公差数值和其他有关符号

D.基准代号

E.指引线