[单选题]短时间退出防误操作闭锁装置时，应经（）或发电厂当班值长批准，并应按程序尽快投入。
A.变电运维班（站）长
B.发令人
C.调控人员
D.监护人

Ninety percent of Americans know that most of their compatriots are overweight, but just 40percent believe themselves to be too fat. Government{{U}} (36) {{/U}}show that more than 60 per cent of the U.S. population is overweight, and half is obese, meaning they are at serious{{U}} (37) {{/U}}of health effects from their weight. But the Pew Research Center telephone survey of more than 2,000 adults finds that many people{{U}} (38) {{/U}}how tall they are and underestimate how much they weigh—and thus do not rate themselves as overweight, even when they are. The survey finds that most Americans, including those who say they are overweight, agree that personal behavior—rather than{{U}} (39) {{/U}}disposition or marketing by food companies—is the main reason people are overweight. In{{U}} (40) {{/U}}, the public says that a failure to get enough exercise is the most important reason, followed by a{{U}} (41)