薄壁工件夹紧方式不当或夹紧力过大,加工后的孔会因弹性变形的恢复而产生()误差。
参考答案:圆度
It is reported that the floods have left about _______ people homeless.
A.two thousand
B.two-thousands
C.two thousands
D.two thousands of
下列句中有使动用法的是()
A.孔安国序《尚书》日
B.犹且各是师说,恶闻至论
C.华叶递荣,声实相副
D.则药其涌泉以寤之