进入受限空间作业应使用安全电压和安全行灯，作业照明电压不大于（）V。
A、8
B、10
C、12
D、14
参考答案：C
- __________ that he managed to get the information? -Oh,a friend of his helped him. [ ]
A. Where was it
B. What was it
C. How was it
D. Why was it
建设工程合同纠纷由仲裁机构裁决后，当事人应当自觉执行裁决。一方当事人不执行的，另一方当事人可以申请( )强制执行。
A．仲裁机构 B．建设行政主管部门C．司法监督机构 D．有管辖权的人民法院
