professor mackay told us that ( ) of lead are its softness and its resistance.a.some properties

professor mackay told us that ( ) of lead are its softness and its resistance.a.some properties professor TOL是什么意思? 19.Professor Mackay told us that ______ of lead are its softness and its resistance.a.some property c.propertiesb.some properties d.property请高手给个确切的答案,再讲下其中的语法知识,我将感激不尽! POS./ NEG.TOL的TOL是什么意思 TOL 是什么化学剂 general Tol是什么意思 英语选择题（2) 16.______,wherever he lives,a man belongs to some society.A.For shortB.In shortC.Of shortD.On short17.Professor Mackay told us that ______ of lead are its softness and its resistance.A.some propertyB.some propertiesC.propertiesD. Tol'vir啥意思 associate professor assistant professor visiting professor 英语单词 professor professor是什么意思 professor是什么意思? TOL是丙烯酸树脂的什么溶剂 TOL是丙烯酸树脂的什么溶剂 法语 Et tol 和 Et vous