what's加介词和what's that加介词的回答有什么区别问问

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what''s加介词和what''sthat加介词的回答有什么区别问问what''s加介词和what''sthat加介词的回答有什么区别问问what''s加介词和what''sthat加介词的回答有什么区别问问前

what's加介词和what's that加介词的回答有什么区别问问
what's加介词和what's that加介词的回答有什么区别
问问

what's加介词和what's that加介词的回答有什么区别问问
前者用it is``````回答,后者用that is