定义表结构时,要定义表中有多少个字段,同时还要定义每个字段的 [2] 、 [3] 、 [4] 等。
参考答案:[2] 名称 [3] 类型 [4] 宽度
At the sight of the policeman, ____ from behind the door.
A.did the boy rush out
B.the boy was rushing out
C.out rushed the boy
D.rushing out was the boy
承包人超越资质等级许可的业务范围签订建设工程施工合同,在建没工程竣工前取得相应资质等级,仍属于无效合同。( )