上次28号来的例假，周期25天，这次到现在都没有来啊，我疯了！！上个月只和男友做过两次，10号之前，还有一次安全期内，带套，但是一开始没，做了一会儿才带的。刚用早早孕测不出来，我这是什么个情况啊。。。。在线等好心人安慰焦急的心。。。为什么还要求字数！！！！？？？？？？？？？？？。。。。。。？？？？？？！！！！！Detection of fifteen kinds of phthalate Ester plasticizers in edible oil by Gas Chromatography-Mass
Lin Li 1,a, Qiuju Sun 1,b, Shigang Xin 2,c, Long Yu 2,d, Zhongli Jiang3,e
1 College of Chemistry and Life Science, ShenYang Normal Univercity, Shenyang 110034, China
2 Experimental Centers, ShenYang Normal Univercity, Shenyang 110034, China
3 Grain Collage, Shenyang Normal University, Shenyang 110034, China
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