E-R图中包含哪几种种基本成分?
参考答案:
实体(即数据对象)、关系和属性
She is the only one among the____writers who___stories for children.
A.woman, writes
B.women, write
C.women, writes
D.woman, write
查各类面层(含不需铺设部分或局部面层)表面的裂纹、脱皮、麻面和起砂等缺陷,应采用()的方法。
A.用钢尺量
B.用锤敲击
C.观感
D.手摸