関連ワード:  which is not a source of protein    which is not a good source of protein    which is not a major source of protein    which is not a source of animal protein    which food is not a source of protein    which nut is rich in protein    which of following is not a source of protein    which food is not a good source of protein    which of the following is not a source of protein answer    which of these is not a good source of protein