常見例句S. and Canada were surveyed by Corty, an associate professor of psychology at Penn State Erie, The Behrend College, and student Jenay Guardiani. 一項性愛調(diào)查得到了這樣的結(jié)論,最佳的性交時間為3至13分鐘。Chris Ference, 19, who has bipolar disorder, at the Behrend College, a Pennsylvania State University satellite campus in Erie, Pa. “并不需要我走向前,跟人說‘喂,我叫簡妮,患有雙極紊亂病。’事實是,我周圍都是樂于助人的好人;我很清楚,如果我需要,他們會阻止我的。”Keywords Behrend;potentiometric titration;analytical chemistry; 貝侖特;電位滴定;分析化學;Keywords Water activity;Trichosporon Behrend;Xylanase; 水活度;絲孢酵母;木聚糖酶;n this paper, we narrate the biograph of Behrend, a German Organic chemist, and expound how he invented potentiometric titration, an important method of electrochemical analysis. 本文記述了德國有機化學家貝侖特的生平,并詳細論述了他發(fā)明電位滴定這一重要電化學分析方法的過程。 返回 Behrend