同一基本尺寸，将孔的上下偏差固定不变，且使下偏差为零，通过改变轴的上下偏差得到不同性质的配合，叫基孔制。
参考答案：对
Film has a much shorter history, especially when such art forms as music and painting.[ ]
A. having compared to
B. comparing to
C. compare to
D. compared to
从给出的选项中，选择最合适的一个填入问号处，使之呈现一定的规律性：().
A.A
B.B
C.C
D.D
