舌系带矫正术的方法为()。
A."Z"形移位瓣
B.黏膜游离移植
C.呈三角形切除
D.口底黏膜转瓣延长术
E.横行切断纵行缝合
参考答案:E
There are two _____ students in my school. But our school _____ library.[ ]
A. hundreds, doesn't have a
B. hundred, doesn't have a
C. hundreds of, doesn't have any
D. hundred, doesn't have any
测量零件表面粗糙度时,最好用几块与被检工件表面粗糙度前后相近的标准样板分别与工件加工表面进行比较,以提高比较测量的()。
A.准确度
B.可信度
C.可靠性
D.稳定性