﹣﹣﹣Yuan Longping is a hero_______ is known for developing hybrid rice（杂交水稻）.
﹣﹣﹣Yes.He is a great man.（ ）
A．whichB．whomC．whatD．that
﹣﹣﹣Yuan Longping is a hero_______ is known for developing hybrid rice（杂交水稻）.
﹣﹣﹣Yes.He is a great man.（ ）
A．whichB．whomC．whatD．that
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