—What’s the weather like today?
—It’s _____.[ ]
A. sun
B. sunny
C. suny
D. suning
答案:B
西式早餐如何摆台?
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