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【单选题】
设原点处有一个电荷Q,距离原点r处放置一点电荷q,距离原点3r处放置一点电荷3q,如果所有电荷电量都为正,且 ,那么哪个电荷的电势能较高?(设无穷远处为电势能零点)( )A.
q
B.
3q
C.
两电荷处的电势相同
D.
2q
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【简答题】The gap between sales figures for product X end product Y increased year on year, with product Y always selling less than product X.
【简答题】The gap between sales figures for product X and product Y increased year on year, with product Y always selling less than product X.
【简答题】什么是环境优先污染物?
【简答题】什么是环境优先污染物？
【简答题】A gap year (also known as year abroad, year out, year off, deferred year, bridging year, time off and time out) is a year during which students take time off and do something other than schooling, suc...
【单选题】The gap year will be meaningful for an 18-year-old if______.
A.
their parents help them make a thoughtful plan
B.
they do what they like
C.
they get enough financial support from their parents
D.
they spend time doing nothing in Cornwall
【单选题】Talk to any parent of a student who took an adventurous gap year (a year between school and university when some students earn money, travel, etc. ) and a misty look will come into their eyes. There a...
A.
They will become more motivated and organized.
B.
They need support from their parents.
C.
They will live more harmoniously with their parents.
D.
They will get their degree more easily.
【简答题】什么是环境优先污染物?简述我国环境优先污染物的情况。
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