1. [由此及彼]根据已知单词的词义推断出其同根词的词义。
① docile a.驯服的；驯良的→incocile a.
② indoctrinate v.灌输→indoctrinator n.
③ doctrinaire n.教条主义者→doctrinairism n.
2. [同义相连]将左栏中的单词和右栏中相对应的词义连接起来。
① indoctrination a.教条至上主义
② indocility b.文件的提供或使用
③ documentation c.难驯服；倔强
④ doctrinism d.灌输；教训
⑤ doctorship e.博士学位
3. [节外生枝]以下单词都来自德语。其中dact可看作doct的异体。
① docent n.教员；临时讲师
② didact n.教育者；说教者
③ didactic a.教学的；教导的；教诲的
④ didactics n.教学学；教学法
⑤ didacticism n.教导（性）；说教（性）
28. duc, duct [L]=to lead引导
常用词conduct, educate, introduce, produce等是同根词。它们的词根duc或duct都来自拉丁动词ducere，意思相当于to lead（引导）。这对词根的孳生能力很强，其同根词不下百个。
conduct [con-表加强词义；duct=to lead引导→] I n.① leading;guidance引导；指导：His conduct of the business is successful.他对企业的指导是有成效的。② leading oneself to a certain result, or behaviour行为；品行：His conduct in school is good.他在学校品行良好。→Ⅱv.① lead or guide 引导；带领：The mayor conducted us through the town.市长带我们参观了城市。②direct（oneself）为人，表现：The children conducted themselves well tonight.孩子们今晚表现得很好。
▽conductor [conduct v.;-or n.] n.指导者；（乐队）指挥；导体
conductible [conduct v.;-ible a.] a.能传导的
conductive [conduct v.;-ive a.] a.传导性的
educate [e-（ex-）=out of从……出来；duc=to lead引导；-ate v.→“to lead out of（the ignorant state）从（无知状态）引导出来”→] v. give training or schooling to教养；教育：He has been well educated.他受过良好的教育。
▽education [educat(e);-ion n.] n.教育；教育的过程
educator [educat(e);-or n.] n.教育工作者
educative [educat(e);-ive a.] a.有教育意义的
introduce [intro-=into进；duc=to lead引导；-e→“to lead into引进”→] v.① lead or bring into use引用；采用：to introduce new techniques采用新技术 ② lead into acquaintance with介绍：to introduce a new teacher to the class把新老师介绍给班上学生
▽introducer [introduc(e);-er n.] n.引进者；介绍人
introduction [intro-;duct;-ion n.] n.引进；介绍；导言
introductory [intro-;duct;-ory a.] a.介绍的；导言的
produce [pro-=forward向前；duc=to lead引导；-e→“to lead or bring forward to some result向前引导，引出结果来”→] v. bring forth;make or create生产；制造；创造：This factory produces lathes.这家工厂生产车床。
▽producer [produc(e);-er n.] n.生产者；制造者
product [pro-;duct] n.产品；成果
production [pro-;duct;-ion n.] n.生产；总产品；总成果
productive [pro-;duct;-ive a.] a.生产的；多产的
deduce [de-=down from从……出来；duc=to lead引导；-e→“to lead a conclusion down from从……引出结论”→] v. draw as conclusion;infer演绎；推理：I deduced that she was married by the ring on her finger.根据她手上的戒指我推断她已经结婚。
▽deduction [de-;duct;-ion n.] n.演绎；推论；扣除
deductive [de-;duct;-ive a.] a.演绎的；推论的
reduce [re-=backward向后；duc=to lead引导；-e→“to lead backward引回头，使后退”→] v. ① bring from a higher position to a lower position使降级：The officer was reduced to the ranks.那个军官被降为士兵。②make less in size, amount, value, etc.缩小；减少；贬值等：to reduce the costs降低成本
▽reducer [reduc(e);-er n.] n.缩减者；减速器
reducible [reduc(e);-ible a.] a.可缩减的
reduction [re-;duct;-ion n.] n.减少；缩小
reductive [re-;duct;-ive a.] a.减少的；缩减的
seduce [se-=aside离，偏；duc=to lead引导；-e→“to lead aside引离正道”→] v. lead astray, or draw aside from what is right勾引；引诱：She seduced him to crime.她引诱他犯罪。
▽seducible [seduc(e);-ible a.] a.易受诱惑的
seduction [se-;duct;-ion n.] n.诱惑；勾引
seductive [re-;duct;-ive a.] a.诱人堕落的
abduct [ab-=away from离开；duct=to lead引导→“to lead away from home引离家庭”→] v. take away by fraud or violence;kidnap诱拐；劫持：His forefather was abducted to America a long time ago.他的祖先是很久前被绑架到美洲的。
▽abductor [abduct;-or n.] n.诱拐者
abduction [abduct;-ion n.] n.诱拐；劫持
induct [in-=into入；duct=to lead引导→“to lead into some group引导加入某种团体”→] v.①introduce formally使正式加入：He was inducted into the trade union.他入了工会。② put in possession使就职：This ceremony inducts the cabinet into office.仪式之后，新内阁正式就职。
▽inductee [induct;-ee n.] n.入会者；就任者
inductor [induct;-or n.] n.引导者；授职人
induction [induct;-ion n.] n.入会；就职
inductive [induct;-ive a.] a.引入的；诱入的
