[单选题] "转动中的发电机、同期调相机的励磁回路或高压电动机转子电阻回路上的工作应填用( )工作票。
A.第一种
B.带电作业
C.第二种
D.二次工作安全措施"

{{B}} Optimists Really Do Live Longer, Say Scientists{{/B}}
1. For the philosopher Arthur Schopenhauer optimism was fundamentally wrong banal and corrupting, while the father of psychoanalysis Sigmund Freud simply declared it to be neurotic.
2. Experience shows that looking on the bright side of life does have advantages and recent scientific evidence points to the positive mindset(思想倾向) as being beneficial to health. In other words optimists live longer.
3. That was the conclusion reached by experts at the Mayo Clinic in the US State of Minnesota who evaluated answers given by people to a set of questions in the 1960s. Of the 729 candidates, 200 had died and according to scientists, there were a disproportionate number of pessimists among them.
4. The points more on the pessimism scale-that wa