在一个孤立静止的点电荷周围()。 A.存在磁场,它围绕电荷呈球面状分布 B.存在磁场

题型:单项选择题

问题:

在一个孤立静止的点电荷周围()。

A.存在磁场,它围绕电荷呈球面状分布

B.存在磁场,它分布在从电荷所在处到无穷远处的整个空间中

C.存在电场,它围绕电荷呈球面状分布

D.存在电场,它分布在从电荷所在处到无穷远处的整个空间中

考点:电气工程公共基础第七章电工电子技术第七章电工电子技术题库
题型:单项选择题

Passage Four

Social change is more likely to occur in societies where there is a mixture of different kinds of people than in societies where people are similar in many ways. The simple reason for this is that there are more different ways of looking at things present in the first kind of society. There are more ideas, more disagreements in interest, and more groups and organizations with different beliefs. In addition, there is usually a greater worldly interest and greater tolerance in mixed societies. All these factors tend to promote social change by opening more as of life to decision. In a society where people are quite similar in many ways, there are fewer occasions for people to see the need or the opportunity for change because everything seems to be the same. And although conditions may not be satisfactory, they are at least customary and undisputed.
Within a society, social change is also likely to occur more frequently and more readily in the material aspects of the culture than in the non-material, for example, in technology rather than in values; in what has been learned later in life rather than what was learned early; in the less basic and less emotional aspects of society than in their opposite; in the simple elements rather than in the complex ones; in form rather than in substance; and in elements that are acceptable to the culture rather than in strange elements.
Furthermore, social change is easier if it is gradual. For example, it comes more readily in human relations on a continuous scale rather than one with violent changes. This is one reason why change has not come more quickly to Black Americans as compared to other American minorities, because of the sharp difference in appearance between them and their white counterparts.

According to the passage, which of the following is true within a society

A.Social change is less likely to occur in technology than in values.

B.What people learned in their early times tends to change quickly.

C.The basic and emotional aspects of society tend to slow down social change.

D.Strange elements are likely to quicken social change.

题型:单项选择题

有关癌性骨关节病的特点错误的是()

A.主要累及长骨远端,X线片上表现为骨膜增生及新骨形成

B.无类似类风湿性关节炎的游走性疼痛

C.关节周围软组织肿胀

D.关节畸形

E.常伴杵状指

题型:单项选择题

1920年,世界上第一家正式注册的广播电台以报道总统竞选开始了正式的电台商业广告营业,这家电台是()的KDKA广播电台。

A.中国

B.美国

C.英国

D.德国

题型:单项选择题

在建设项目各类招标中,不要求投标人依据给定工作量报价的是( )招标。

A.施工
B.设备采购
C.设计
D.材料采购

题型:单项选择题

重点调查选取的调查单位,必须是那些标志值之()在总体标志值总量中占绝大比重的重点单位。

A、积

B、和

C、差

D、商

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