Not all cultures greet each other the same way,nor are they

Not all cultures greet each other the same way, nor are they comfortable in the same way with touching or distance between people.
nor are they就是部分倒装.因为nor是个否定副词,位于句首.
而not all cultures在句首不倒装,因为这里not all cultures是充当主语的.
He is not in the classroom, nor is his teacher. （他不在教室,他的老师也不在教室）