逆铣与顺铣相比,其优点是()。
A.散热条件好
B.切削时工作台不会窜动
C.加工质量好
D.生产率高
参考答案:B
There are more than three thousand students in my school, most of____ from the country.
A.that
B.which
C.whom
D.them
职业培训教学目标必须突出()的特性。
A.实用
B.实际
C.实效
D.合理