根据词性和汉语提示，写出下列单词
1．harm n．& vt.伤害，损害→harmful adj.有害的→harmless adj.无害的
2．long adj.长的，长时间的→length n．长，长度；时间的长短；篇幅，(电影)片长
3．survive vi.生存，存活vt.幸存，幸免于难→survival n．残存物；幸存事物→survivor n．幸存者；生还者
4．disappear vi.不复存在，灭绝，消亡；消失；失踪→disappearance n．消失；失踪
5．agriculture n．农业，农学→agricultural adj.农业的
1．variety n．不同种类；变化，多样性；变种，变体
①I was impressed by the variety of dishes on offer.不同种类
②We want more variety in our work.变化，多样性
③Apples come in a great many varieties.变种，变体
2．living adj.活着的，活的；在使用的 n．生计，谋生；生活方式
①Father never talked about what he did for a living.生计
②Chinese is one of the most beautiful languages that is living in the world.在使用的
③He is the finest living pianist that I have ever seen.活着的
