1. [詞根辨異]我們又遇到一對異源同形根：tent1（tendere的動名詞詞干，意為to stretch）和tent2（tenere的動名詞詞干，意為to hold）。請指出下列單詞詞根的含義：
attention retention detention ostentation
abstention sustention distention (=distension)
2. [詞根辨識]在下列各對異源同形詞中，有一個是本族詞。請根據(jù)詞義與詞根含義的關(guān)系，指出這個本族詞。
① tender1 a.柔軟的 tender2 v.提出；提供
② tent1 n.帳篷 tent2 n.深紅色葡萄酒
③ tense1 a.緊張的 tense2 n.時態(tài)
3. [同義相連]將左欄中的單詞和右欄中相對應(yīng)的詞義連接起來。
① hypertension a.[解剖學]伸肌
② tensometer b.高血壓
③ extensor c.張布架
④ tentage d.張力計
⑤ tenter e.帳篷；宿營裝備
4. [由此及彼]根據(jù)已知單詞的詞義推斷出其同根詞的詞義。
① extensible a.可延伸的；可擴展的→inextensible a.
② pretentious a.自負的；矯飾的→unpretentious a.
5. [尋根問底]指出下列單詞的詞根并領(lǐng)會其詞義的由來。
① tend v.照管；服侍；招待
tender n.照料人；看管人
tendance n.照料；服侍；看護
② protend v.（使）伸展；（使）伸延
protensive a.延長時間的；延長的；伸長的
③ superintend v.監(jiān)督；主管；指揮
superintendence n.監(jiān)督；主管；指揮
superintendent n.監(jiān)督人；主管人 a.監(jiān)督的
④ intensifier n. [物] 增強劑
intensification n.增強；強化
93. tract [L]=to draw拉，抽
詞根tract的意思與tend正好相反，它來自拉丁動詞trahere的動名詞詞干，意為to draw（拉，抽）。在英語中，tract直接作為名詞，意思為“一片土地”，“地帶”。
attratct [at-(ad-) = towards 向；tract = to draw 拉→] v. draw towards oneself吸引：A magnet attracts iron.磁石吸鐵。
▽attraction [attract;-ion n.] n.吸引；吸引力
attractive [attract;-ive a.] a.有吸引力的
contract [con-(com-)=together一起；tract=to draw拉→“to draw together拉在一起”→]Ⅰv.① draw together and become more compact收縮：Cold contracts metals.金屬遇冷收縮。② draw (two sides) together to make a legal agreement締結(jié)（條約）；訂立（合同）：The two countries contracted an alliance.兩國締結(jié)了盟約。→Ⅱn. a legal agreement that draws together two sides契約；合同：to sign a contract簽訂契約
▽contraction [contract v.;-ion n.] n.收縮；縮約詞
contracture [contract v.;-ure n.] n. [醫(yī)學]攣縮
contractive [contract v.;-ive a.] a.收縮的；有收縮性的
contractual [contract n.;-u-;-al a.] a.契約的
extract [ex-=out;tract=to draw抽→]Ⅰv.① draw out or pull out抽出；拔出：to extract a bad tooth拔掉壞牙②draw out or obtain by squeezing抽?。徽ト。簍o extract juice from sugarcanes 從甘蔗榨出糖汁③ draw out or copy imformation from a book, etc.摘錄；引用：to ex-tract a passage from the story 從故事中選出一段→Ⅱn.① anything drawn out 抽出的東西：beef extract 牛肉汁 ② passage copied out摘錄：extracts from newspapers報刊摘錄
▽extraction [extract;-ion n.] n.抽出（物）；提出（物）；摘要
extractive [extract;-ive a.] a.抽出的；提取的
retract [re-=back回；tract=to draw抽→] v.① draw back or draw in抽回；縮進：The cat retracted its claws.貓把爪子縮了回去。② draw back or take back (a remark, promise, etc.)收回；取消（意見、諾言等）：He retracted the insult and apologized.他收回無禮之詞并賠禮道歉。
▽retraction [retract;-ion n.] n.收回；撤消；縮回；縮進
retractive [retract;-ive a.] a.縮回的；易縮回的
retractile [retract;-ile a.] a.（爪等）能縮回的；收縮的
detract [de-=away去；tract=to draw抽→] v. draw away or take away a part of (value, reputation, etc.) 減損；貶低：The criticisms do not detract from his merit.批評并不貶低他的功績。
▽detraction [detract;-ion n.] n.減損；貶低
detractive [detract;-ive a.] a.減損的；貶低的
distract [dis-=apart分開；tract=to draw抽，牽引→] v. draw apart (the mind), or divert (the attention)引開（心思）；分散（注意力）：The noise distracted me form reading.吵鬧聲使我無法專心讀書。
▽distraction [distract;-ion n.] n.精神渙散；精神錯亂
protract [pro- = forward 向前；tract = to draw 拉→“to draw the time forward把時間向前拉”→] v. prolong拖延，延長：Can you protract your stay for two days?你能在這兒多呆兩天嗎？
▽protraction [protract;-ion n.] n.延長；拖延
subtract [sub- = under, down 下；tract = to draw 拉→“to draw down a quantity把數(shù)量拉下”→] v. take away by deducting去掉；減去：to subtract the expenditure裁減開支
▽subtraction [subtract;-ion n.] n.減去；減法運算
subtractive [subtract;-ive a.] a.減少性的；帶負號的
subtrahend [sub-;trah;-end n.] n.減數(shù)
