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科目： 來(lái)源：gzsw 題型：

2、某三十九肽中共有丙氨酸4個(gè)，現(xiàn)去掉其中的丙氨酸得到4條長(zhǎng)短不等的多肽（如右圖），下列有關(guān)該過(guò)程的敘述中，錯(cuò)誤的是

A．O原子數(shù)目不變 

B．肽鍵數(shù)目減少7個(gè)  

C．C原子減少l2個(gè) 

D．氨基和羧基分別增加3個(gè)

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科目： 來(lái)源：gzsw 題型：

1、下列物質(zhì)或結(jié)構(gòu)中含有糖類(lèi)的是

①ATP  �、贒NA　  ③染色體　  ④細(xì)胞膜　  ⑤脂肪  �、薜矸勖�

A．①②③④        B．①③④⑥      C．①②③⑥       D．②③④⑥

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科目： 來(lái)源：gzsw 題型：

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科目： 來(lái)源：gzsw 題型：

38、（You may read the questions first）

Products: mail order

Bay 3-piece luggage set for only  ￡69.99                   ALL ORDERS           

Half price offer                                         DELIVERED                     

Pack with confidence, Travel in Style…. Arrive intact           DELOVERED              

This elegant luggage is manufactured in a new hard-wearing plastic FREE TO YOUR

 which is strong and very light in weight                        DOOR

·Light but hard-wearing

·3 locks （2 key and I combination lock ）for total security

·Supplied with initials for personalization

MD 9572 ￡69.99

Plan your journey they easy way This portable Traveler will give you directions from A to B

anywhere in England, Scotland and Wales. Just enter the start and the end of your journey and the Traveler will work out the quickest route. The Traveler can also estimate the journey time. average speed and fuel consumption. Need to change your journey at any stage?The Traveler will give you a new set of directions. Other features include auto shut-off.And a built-in light for night-time use.

Powered by 4AA batteries （not supplied）.

MD 7437 Traveler ￡69.99

How much do you know?

Everyone, young and old, enjoys and challenge of quizzers. Our electronic Quizmastercontains 5,400 questions and answers in 6 classifications-general knowledge, sport, science, geography, art and history. Each of these is further divided into 3 skill levels（easy, medium and difficult）so younger children can fairly compete against teenagers and adults. PLUS!

Every Quizmaster includes:

·8 Games of Hangman

·Portune Teller Games

·10-digit calculator

·long life cell batteries included

MD 9569 Quizmaster was ￡19.99 now ￡14.99

1 In advertisement 2, the Traveler enables us to learn__________.

A. the road conditions from London to Oxfords

B. all the garages along the chosen route

C. the time and speed of the journey in Britain

D. the directions from London to Paris.

2 In advertisement 3, the Quizmaster_________.

A. contains nothing but 5400 questions  B. can only answer challenging questions

C. can be purchased in many shops     D. can be used by people of all

3 All these advertisements are aimed at those_________.

A. who like to order goods at home    B. who are going to travel abroad

C. who do market researches         D. who are interested in intelligence tests

 

 

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科目： 來(lái)源：gzsw 題型：

36、Our English teacher had us all _______our names on a card.

A. written     B. to write        C. write            D. for writing

 

 

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科目： 來(lái)源：gzsw 題型：

35、They ______ be at home. You see, the door is locked from the outside.

A. can’t       B. may          C.  must           D.  mustn’t

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34、The farmer who admitted ______ the tiger was severely punished.

A. to kill      B. killing        C. killed            D. to have killed

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33、So often ______ in recent years that it has almost become a rule.

A. has this happened              B. this has happened

C. is this happening               D. for this to happen

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科目： 來(lái)源：gzsw 題型：

32、市場(chǎng)上銷(xiāo)售的大粒花生和小�；ㄉ峭环N植物兩個(gè)不同的品種。為探究大、小�；ㄉN子的大小是否是遺傳物質(zhì)不同造成的，某興趣小組對(duì)大、小粒花生種子進(jìn)行了如下實(shí)驗(yàn)：

（1）將一小塊實(shí)驗(yàn)地均分成兩份，隨機(jī)抽取種子公司購(gòu)買(mǎi)的純合大、小�；ㄉN子各20粒分別種在上述兩塊實(shí)驗(yàn)地中。

（2）收獲期分別收集兩塊地中的大、小�；ㄉ麑�(shí)。曬干處理后，隨機(jī)抽取大、小�；ㄉN子各30粒,對(duì)它們的長(zhǎng)度進(jìn)行測(cè)量, 并將數(shù)據(jù)記錄在各自的表格中。

（3）將表格中的數(shù)據(jù)轉(zhuǎn)換成單坐標(biāo)雙曲線圖，如下圖所示。

（4）求出大、小�；ㄉN子的平均長(zhǎng)度分別為1.77cm和1.18cm。

根據(jù)材料回答下列問(wèn)題：

（1）該興趣小組的實(shí)驗(yàn)步驟中有兩處明顯的失誤是：

①                                    ；②                                   。

（2）假設(shè)圖中的數(shù)據(jù)是經(jīng)正確實(shí)驗(yàn)步驟操作后獲得的，則大粒花生種子平均粒長(zhǎng)比小�；ㄉN子的平均長(zhǎng)度要長(zhǎng)，說(shuō)明                                                      ；

大粒花生種子中有比小�；ㄉN子長(zhǎng)度短的，小粒花生種子中也有比大�；ㄉN子長(zhǎng)度長(zhǎng)的，說(shuō)明                                                                      。

（3）大、小�；ㄉN子的大小取決于種子子葉的大小。觀察發(fā)現(xiàn)大粒花生種皮顏色為淺紅色，小粒花生種皮顏色為深紅色。為了進(jìn)一步了解花生種子大小和種皮顏色的顯隱性關(guān)系，請(qǐng)你簡(jiǎn)要寫(xiě)出實(shí)驗(yàn)設(shè)計(jì)思路，并就可能出現(xiàn)的實(shí)驗(yàn)結(jié)果和結(jié)論進(jìn)行討論。

 

 

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