1. [同义相连]左列是几个数学上的符号或式子；右边是表示式子或符号含义的单词，都是equ的派生词。提示：sub-=近似于；angular=角的；lateral=边的。
① x≠y（不等于） a. subequal
② m≈n（约等于） b. equiangular
③ ∠B=∠C（等角的） c. equidistant
④ AB=AC（等距离的） d. equilateral
⑤ b=c（等边的） c. unequal
2. [望文生义]根据所学词根的知识推测下列单词的词义。
① unequable a.
② unequivocal a.
③ inadequate a.
④ equilibrator n.
3. [寻根问底]指出下列单词的词根并领会其词义的由来。
① coequal a.相等的 n.相互平等的人或事物
② equity n.公正
③ equimultiple a.等倍数的
④ equipoise n.平衡；平静；均势
⑤ equipollent a.相等的，均等的 n.相等物；等价物
⑥ equimolecular a.等分子的
⑦ equitable a.公平的；公正的
⑧ equinox n.昼夜平分时（提示：nox=night）
⑨ equipotential a.在潜力上均等的
⑩ equivoque n.两义语；双关语（提示：voque=voice）
30. fac, fact, fect [L]=to do, to make做
fac，fact和fect是一组同源异形根，它们都来自拉丁动词facere，意思相当于to do或to make（做）。其中，fac是不定式词干；fact是动名词词干；fect是动词facere的异体ficere动名词词干。
facile [fac=to do做；-ile a.=able or easy to be能……的，易……的→“able or easy to be done能做的，易办的”→] a.① working with ease;skilled驾轻就熟的；熟练的：a man with a facile tongue能说会道的人② easily done易做的：The work is facile, but take it serious.工作容易，但还要认真对待。
▽facility [facil(e);-ity n.] n.容易；熟练
facilitate [facil(e);-itate(-ate) v.] v.使容易；促进
faculty [fac=to do做；-ulty（-ile+-ty）n.=ability表能力→“ability of doing things做事情的能力”→] n. ability to do;any particular power能力；才能：faculty for painting绘画的才能
▽facultative [facult (y);-ative a.] a.能力上的；才能上的
fact [来自动名词factum=thing done 做过的事情→“anything done or occurred做过的或发生过的事”→] n.① thing known to have occurred or to be ture事实：Facts speak louder than eloquence.事实胜于雄辩。② what is true or existent;truth;reality实际；真相；实情：in fact实际上
▽factual [fact;-u-;-al a.] a.事实的；真实的
factor [fact=to do做；-or n.=thing物→“thing that does or acts起作用的事物”→] n. element that brings about a result因素；要素：positive factors积极因素
▽factorial [factor;-ial a.] a. [数]因子的
factorize [factor;-ize v.] v. [数]将……分解因子
factory [fact=to make制作；-ory n.=place场所→“place for making 制作场所”→] n. working-building;workshop工厂：chemical factory化工厂
benefactor [bene=good好；fact=to do做；-or n.=person人→] n. person who does good deeds or gives friendly aid做好事者；恩人：benefactors of an orphanage 孤儿院的施主
▽benefaction [bene;fact;-ion n.] n.行善；施恩
affect [af-(ad-)=upon在……之上；fect=to do or act起作用→“to act upon作用于……之上”→] v.① influence影响：Climate affects the agricultural production.气候影响农业生产。② act upon the feeling of感动：The audience were deeply affected.观众深为感动。
▽affection [affect;-ion n.] n.影响；感情
affective [affect;-ive a.] a.感情方面的；表达感情的
effect [ef-(ex-)=out出；fect=to make造→“to make out造出”→]Ⅰv.① produce;bring about产生；招致：to effect a change in climate引起气候变化② accomplish实现：to effect the greatest economy力求节约→Ⅱ n. result made out, or influence 结果；影响：cause and effect因与果
▽effective [effect v.;-ive a.] a.有效的；生效的
effectual [effect n.;-u-;-al a.] a.奏效的；有效的
effectuate [effect n.;-u-;-ate a.] v.使奏效；实现
defect [de-=away, down 离，下降；fect=to do 做→“to do away with one's duty, etc.离开所做之事”→]Ⅰv. desert开小差；背叛：He defected to the enemy.他叛变投敌了。→Ⅱn. things down from the normal quality毛病；缺点：He has the defects of his qualities.他有美中不足之处。
▽defector [defect v.;-or n.] n.逃兵；叛徒
defection [defect v.;-ion n.] n.背信；变节
defective [defect n.;-ive a.] a.有缺点；不完全的
infect [in-=into进入；fect=to make使……→“to make...into the body使……进入身体”→] v. spread a disease to;affect with a disease传染；侵染：The wound is infected.伤口受感染。
▽infection [infect;-ion n.] n.传染；传染病
infectious [infect;-i-;-ous a.] a.易传染的
perfect [per-=throughout彻底；fect=to do做→“to do throughout, or done thoroughly做得彻底”→]Ⅰa. complete and faultless完美的：perfect method完美的办法→Ⅱv. finish;make fully skilled使完成；使精通：Try to perfect yourself in English.努力精通英语。
▽perfection [perfect v.;-ion n.] n.尽善尽美
perfective [perfect v.;-ive a.] a.导致完美的；改善的
perfectible [perfect v.;-ible a.] a.可完成的；可改善的
