当车床夹具以长锥柄在机床主轴锥孔中定位时,( )。
A. 定位精度高刚度高
B. 定位精度高刚度低
C. 定位精度低刚度低
D. 定位精度低刚度高
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车淬硬钢时,车刀前角一般选用yo=( ),硬度越高,前角的绝对值应越大。
A. 1°~10°
B. 10°~20°
C. 20°~30°
D. 30°~40°
某宗房地产的成交价格为4000元/㎡,卖方缴纳的税费为成交价格的8%,买方缴纳的税费为成交价格的5%。卖方的净得为()元/㎡。
A. 3680
B. 3800
C. 4200
D. 4320
Samson Agonistes is a(n)______.
A. verse drama
B. novel
C. epic
D. prose
One difficulty in discovering kwashiorkor is that______.
A. it has no viruses
B. it is like other diseases
C. it is hard to see signs of it
D. it does not last long