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!

professor mackay told us that ( ) of lead are its softness and its resistance.a.some properties 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! professor 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. associate professor assistant professor visiting professor 英语单词 professor professor是什么意思 professor是什么意思? institute professor 和sterling professor是什么意思 这个人名怎么翻译Bonnie Jean MacKay,大概判断是女性还是男性, 19.Professor Smith is____most interesting as a lecturer.A.a B.the C.some D./ The Professor音标?RT visiting associate professor是什么意思 associate professor什么意思 distinguished alumni professor是什么意思 professor Waterss是什么意思