下列哪一项是判断骨折延迟愈合最可靠的依据
A．骨折愈合时间延长
B．骨痂少
C．轻度脱钙
D．骨折线存在
E．骨折端无骨硬化
参考答案：E
To our delight, we got _______ workers to do the work as we expected.
A．as twice many
B．twice as many
C．twice many as
D．as many twice
施工单位应当依法取得()后，方可从事水利了程施工活动。
A、施工许可证
B、施工监理证
C、工程付款
D、安全生产许可证
