主谓一致的问题 salt is valued not only because of……
salt is valued not only because of its properties as a condiment and preservative,but also because it is essential to the health of humans and animals.
这句话的properties不应该是property吗?后面虽然有and,但是preservative没有加a,不就是说两者合在一起吗?我的意思就是说 a teacher and writer和a teacher and a writer的这种区别= =