正确答案: B

一定不相等

题目：静电场中同一根电场线上两个不同点的电势（）

解析：B

查看原题 点击获取本科目所有试题

举一反三的答案和解析：

[单选题]若在9阶B-树中插入关键字引起结点分裂，则该结点在插入前含有的关键字个数为( )

8

[单选题]Parents can have a great impact on the development of their children's creativity in art. But first，they have to know how. They may find the following advice interesting and instructive.Encourage free drawing rather than coloring books. Coloring books stop the possibility of self-expression. A child may just enjoy colorful pictures and never learn how to express himself. As an art teacher says，“Children have a very powerful instinct to draw freely and roughly. Such practice makes them learn language easily. ”In fact，a child expresses himself in rough drawing. This is the beginning of literacy and creativity. Also，parents should not teach their kids“how”to draw and they should not make their kids draw realistic pictures to entertain themselves. Experience tells us that such teaching from the parents will discourage children，making them think they can't do it the “right”way.

draw freely and roughly

解析：解析：推理判断题。由第二段第一句可知：应该鼓励孩子们自由地画画而不应该鼓励他们看彩色书。且由第二段第四句可知：孩子们的自由，随意画画的能力很强。因此，A项符合题意。

[单选题]She failed in the exam, ____proves that she wasn’t working hard enough at school.

which

[多选题]资本的技术构成是（ ）

从物质方面考察的资本构成

反映生产技术水平的资本构成

用生产资料和劳动力的比例关系表现的资本构成

决定资本价值的构成

解析：ACDE

[单选题]中共十六大报告明确指出，要建立与社会主义市场经济相适应、与社会主义法律规范相协调、与中华民族传统美德相承接的社会主义思想道德体系。社会主义思想道德体系，必须以为人民服务为核心、以集体主义为原则，并（ ）

以诚实守信为重点