nothing = not anything,none = not any,not one 一点也没有；一个也没有,即数量概念
1none用来回答How many / much的提问.如 -- How many animals are there in the park?-- None./ -- How much information did you receive?-- None.
2nothing用来回答What的提问.如 -- What’s under the table?-- Nothing.
how much 提问回答的数所以选none