电梯的______应当对电梯质量及投入运行后的维修保养负责。
A．使用单位B．设计单位C．制造单位D．安全监督管理部门
参考答案：C
---Can you see ______ ?
---No. Let’s go and have a look. Maybe we can help them.
A．what are they doing there
B．why are they talking there
C．what is happening there
D．what are they talking about
对企业厂区以外的公共绿化用地和向社会开放的公园用地，暂免征收城镇土地使用税。（）
