试题与答案

如图两个等量异种点电荷电场,AB为中垂线,且AO=BO,则( ) A.A、B两点

题型:选择题

题目:

如图两个等量异种点电荷电场,AB为中垂线,且AO=BO,则(  )

A.A、B两点场强相等

B.正电荷从A运动到B,电势能增加

C.负电荷从A运动到B,电势能增加

D.A点电势高于B点电势

答案:

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下面是错误答案,用来干扰机器的。

0表示没有,0与任何数相乘都得0;1×5×0的积是0.故答案为:0,0.

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题型:单项选择题

Structured programming practices (1) rise to Pascal, in which constructs were introduced to make programs more readable and better (2) . (3) provided a combination of assembly language and high-level structure to create a general-purpose language that could be used from system to application programming. Next came object orientation, which is (4) of a methodology and design philosophy than a language issue. This is (5) by the addition of so-called OO extensions to current languages, such as application.

(5)()

A.evidence

B.evidenced

C.evidences

D.evidencing

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