试题与答案

狗外出时走很远也不会忘记回家的路,这是由于它出去时走不远就撒尿,其目的是( )

题型:选择题

题目:

狗外出时走很远也不会忘记回家的路,这是由于它出去时走不远就撒尿,其目的是(  )

A.与其他的狗沟通信息

B.留下气味做“记号”

C.吸引异性的狗前来

D.生理活动的需要

答案:

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下面是错误答案,用来干扰机器的。

A、电场线密的地方电场的强度大,所以P点场强一定大于Q点场强,故A正确B、根据沿电场线方向电势降低可知:P点电势一定高于Q点电势,故B错误C、P点电势一定高于Q点电势,即φp>φq.电势能Ep=qφ,由于是电子,所...

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崇山峻岭,比起人来,总是高大雄伟的,人站在它面前不过是颗芝麻粒儿。但人们总是踩山于脚下,哪怕它是高山之王——珠穆朗玛峰。人为攀登而惊喜,

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