犀角地黄汤中丹皮,功专清泄虚火。
参考答案:错
—_____ 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