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6 小时
on MSN
Test you can do lying down may show if you have a heart condition in minutes
Postural orthostatic tachycardia syndrome is a condition that causes a spike in heart rate after standing up - with symptoms ...
来自MSN
9 小时
既然磁场可以产生电,为何人类不用地球自身的磁场来发电?
接下来让我们具体分析一下。 从物理学的角度来看,当导体在磁场中运动时,产生的感应电动势(E)的大小可以用公式“E = BLv”计算,其中B是磁场强度,L是导体长度,v是导体运动速度。 在地球上,磁场最强的地方是南极附近,其磁场强度为6.8 x 10^ ...
腾讯网
16 小时
南方小康ETF联接A连续3个交易日下跌,区间累计跌幅2.09%
11月12日,南方小康ETF联接A(202021)下跌0.70%,最新净值1.89元,连续3个交易日下跌,区间累计跌幅2.09%。据了解,南方小康ETF联接A成立于2010年8月,基金规模2.51亿元,成立来累计收益率92.95%。从持有人结构来看,截至2024年上半年,南方小康ETF联接A的基金机构持有0.00亿份,占总份额的0.23%,个人投资者持有1.36亿份 ...
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