信用社员工持证上岗考试考核办法要求：员工持证上岗考核由（）组织实施。
A、内蒙联社
B、教育部门
C、人力资源部
D、用人单位
参考答案：D
The new bridge in Wenchuan ____ last month. Now it's easy to go to the city center.[ ]
A. built
B. was built
C. has been built
D. were built
类是变量和 【10】 的集合体。
