问题
问答题 简答题
变压器零序保护的保护范围是哪些？
答案
参考答案：
变压器零序保护装在变压器中性点直接接地侧，用来保护该侧绕组内部及引出线上的接地短路，也可作为相应母线和线路接地短路的后备保护。
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变压器零序保护的保护范围是哪些？
参考答案：
变压器零序保护装在变压器中性点直接接地侧，用来保护该侧绕组内部及引出线上的接地短路，也可作为相应母线和线路接地短路的后备保护。
| 阅读下面短文，根据所读内容在表格中的空白处填入恰当的单词。注意：每个空格只填一个单词。 | ||||||||
| Few Americans stay in one a place for a lifetime. We move from the city to the suburbs (郊区), from high school to college in a different state, from a job in one area to a better job elsewhere, from the home where we raise our children to the home where we plan to live in retirement. With each move we are forever making new friends, who become part of our new life. For many of us the summer is a special time for forming new friendships. Today, millions of Americans go on vacation abroad, and we go not only to see new sights but also in those places where we don't feel too strange with the hope of meeting new people. No one really expects a vacation trip to produce a close friend, but the beginning of a friendship is possible. Surely in every country people value friendship. The word "friend" to American people can be applied to a wide range of relationships-to someone one has known for a few weeks in a new place, to a close business companion, to a childhood playmate, to a man or a woman, or to a trusted colleague. There are real differences among these relations for Americans a friendship may be shallow, casual, situational or deep and lasting. But to a European, who sees only our surface behavior, the differences are not clear. As Europeans see it, all kinds of "friends" flow in and out of Americans' homes with little ceremony. They may be parents of the children's friends, house guests of neighbors, members of a committee, business associates from another town or even another country. Coming as a guest into an American home, the European visitor finds no obvious landmarks. The atmosphere is relaxed. Most people, old and young, are called by first names. Americans' characteristic openness to different styles of relationship makes it possible for us to find new friends abroad with whom we feel at home. | ||||||||
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