1, the unit of the table, to put it bluntly, is how to call the numerical unit of the table. Is it "one", "one" or "only"? Actually, none of these are. The unit standard of a watch should be "sheets", that is, as many sheets as there are. Some people also call the table "A". This can only be a colloquial expression, not a standard unit. Only the address "Zhang" is the correct unit address.
2. According to the above discussion and explanation, the correct title of the unit in this table is "Zhang". Only using "Zhang" to express the number of tables is the correct unit expression.