装配前,按公差范围将零件分成若干组,然后把尺寸相当的零件进行装配,已达到要求的装配精度,这种装配法称为()
A、完全互换法
B、选配法
C、调整法
D、修改法
参考答案:B
Bowing to others is considered ______ but bowing to difficulty is not considered a good quality [ ]
A. to be a good manner
B. a good manners
C. to be good manners
D. being good manners
临床疑诊患者为原发性肝癌,首选检查方法是
A.CT
B.B超
C.磁共振
D.肝功能检查
E.动脉造影