—_____ do you shop?

—I shop every week.[ ]

A. How many

B. How much

C. How often

D. How far

用镗模法加工平行孔系加工精度不受（）的影响。

A.镗杆与镗模导套的配合精度

B.镗模孔距精度

C.机床精度

D.镗杆主轴连接方式