professor mackay told us that ( ) of lead are its softness a

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

意思是“MACKAY教授告诉我们,铅的特性有柔软度和电阻力”,如果填那个选项的话.
property可是财产的意思,也可以是性质,如果表示性质的话就要填复数形式.而这里要在properties前面加一个限定词,可以是some,当然,如果是the properties 也是可以的
再问：那为什么要加限定词呢
再答：这个，如果不是泛指的话，都是要加限定词的，比如，我们班的学生 the stydents of our class,但是如果是泛指，学生们， students,不需要加。而这里的some也是限定词的一种大部分基本上都是要加的，你记住这一点就行，很少可以不加，如专有名词这种

professor mackay told us that ( ) of lead are its softness a 19.Professor Mackay told us that ______ of lead are its soft Our teacher told us that Yellow River （）its way from west t Doctor Ray told us that trees are ___air conditioners填空 In a country that reveres its runners,many of whom are the b 7.The teacher told us ___________________.A.that light trave The villagers told us that a new bridge_____across the river our teacher told us that sound travels____than light. A much 首字母填空most of us are in a ___ that the prices of houses in Ch told us a None of us （）（discover）the truth until he told us about that 英语翻译198646.The professor told the 【economicsA】 student that