[单选题]电流互感器(____)故障不需要立即停用。
A.支柱爆炸或外部变形
B.支柱表面放电严重
C.漏油、漏气严重
D.引线接头发热严重

In the early 1950’s historians who studied pre-industrial Europe (which we may define here as Europe in the period from roughly 1300 to 1800) began, for the first time in large numbers, to investigate more of the pre-industrial European population than the 2 or 3 percent who comprised the political and social elite; the kings, generals, judges, nobles, bishops and local magnates who had hitherto usually filled history books. One difficulty, however, was that few of the remaining 97 percent recorded their thoughts or had them chronicled by contemporaries. Faced with this situation, many historians based their investigations on the only records that seemed to exist: birth, marriage, and death records. As a result, much of the early work on the non-elite was aridly statistical in nature; reducing the vast majority of the population to a set of numbers was hardly more enlightening than ignoring them altogether. Hi
A. They failed to make distinctions among members of the pre-industrial European political and social elite.
B. They used investigatory methods that were almost exclusively statistical in nature.
C. They inaccurately estimated the influence of the pre-industrial European political and social elite.
D. They confined their work to a narrow range of the pre-industrial European population.