[单选题]在发生人身触电事故时，可以不经许可，即行断开有关设备的电源，但事后应立即报告（ ）和上级部门。
A.调度控制中心或工作负责人
B.工作负责人或设备运维管理单位
C.调度控制中心或设备运维管理单位
D.工作负责人或班站长

In America and many other countries, one special kind of box contains the future. It’s called a ballot box. What people put into the box on Election Day can change the course of history.
Elections are the {{U}} (36) {{/U}} of a democracy. The word democracy {{U}} (37) {{/U}} means "the people rule", an important {{U}} (38) {{/U}} in America’s history. In America, elections are held every two years for members of Congress. In these elections, all seats in the House of Representatives and one-third of the Senate seats are up for grabs. Every four years, voters go to the polls to {{U}} (39) {{/U}} the nation’s president and vice-president. Voters also regularly vote for state and city government leaders and local school board members.
In the American electoral system, people don’t really vote for presidential candidates. Instead, voters {{U}} (40) {{/U}} their ballots for "electors" who support each candidate. Each state has as