The Fukushima disaster in Japan in 2011 effectively brought a global nuclear boom to a halt.Countries like Sweden,Switzerland and Germany are continuing to phas
Effect factors of the absorption of the source,air,entrance window,and dead layer of a detector must be considered in the measurement of monoenergetic alpha par
编者按:很多同学都说学英文很枯燥,学英文很痛苦,但是其实,如果你放松心情,忘记英语是你的成绩衡量器,你便很快能从英语中,感受到另一个世界的美妙,看到更广阔的天空,来吧!跟小编一起,读读这篇《男孩和露珠》。 One morning, a little boy squatted still on the grass in the garden for a long time. His mother