This paper will analyze the personality characteristics and mental health of drug addicts with Eysenck Personality Questionnaire, and explore the psychological factors of the drug. 本文採用艾森克問卷對吸毒人員的人格特點和心理健康狀況進行分析研究，探究吸毒行為產生的直接心理誘因。
So rhizobia was the main induced factors of transfer cells, and the lacking of iron was only the secondary factors during the development of root nodule. 電鏡觀察結果表明，在根瘤形成過程中，根瘤菌是刺槐根外層傳遞細胞的主要誘因，而缺鐵僅是次要因子。
