对属性值域的约束也称为( )。
A．静态完整性规则
B．动态完整性规则
C．域完整性规则
D．值完整性规则
参考答案：C
By the end of last year,another new theme park completed in that area. [ ]
A. was being
B. would be
C. has been
D. had been
为确定分期，该患者还需要做哪项检查
A．骨髓穿刺
B．肿瘤标志物
C．骨髓活检
D．血清铁、总铁结合力
E．淋巴结活检
