皮皮学，免费搜题
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【单选题】
如果某带电体其电荷分布的体密度 增大为原来的 2 倍,则其电场的能量变为原来的A.
2倍
B.
0.5倍
C.
4倍
D.
0.25倍
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】关于肺的体表投影描述,正确的是
A.
肺尖高于胸膜顶 1cm
B.
左肺的前缘在第 6 肋间隙转向外侧
C.
肺下缘在锁骨中线与第 6 肋相交
D.
肺下缘在腋中线与第 9 肋相交
E.
肺下缘在后方终于第 12 胸椎棘突
【单选题】Under normal circumstances the body can ( ) these naturally occurring substances into vitamins.
A.
convert
B.
render
C.
derive
D.
originate
【单选题】They sparkle and glitter in the light. No other rocks are so hard. They are very valuable. It might cost thousands and thousands of dollars to buy just one. Most are found in the ground. The largest o...
A.
they sparkle and glitter in the light
B.
they are very hard
C.
they are very valuable
D.
they are tiny
【单选题】Under no circumstances ______ to Guilin for the holiday.
A.
we can consider to go
B.
can we consider to go
C.
we can consider going
D.
can we consider going
【简答题】You can keep yourself from the rain under it.
【单选题】They sparkle and glitter in the light. No other rocks are so hard. They are very valuable. It might cost thousands and thousands of dollars to buy just one. Most are found in the ground. The largest o...
A.
they sparkle and glitter in the light
B.
they are very hard
C.
they are very valuable
D.
they are tiny
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