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27.He glanced over at her, ____that though she was tiny, she seemed very well put together.

    A.noting       B.noted       C.to note      D.having noted

試題詳情

26.As an athlete, nothing comes _____Jim and his morning exercise.

    A.out         B.between     C.with         D.a(chǎn)mong

試題詳情

25.As soon as he comes back, I’ll tell him when ________and see him.

    A.you will come                B.will you come            

    C.you come                                    D.do you come

試題詳情

24.-----My brother failed in business.

    -----_____.

    A.I am certain he’ll make it.                    B.That’s really tough.

    C.Everything is going well with me.                D.Actually, there is no choice anyway.

試題詳情

23.The flight attendant welcomed us ___ the plane.

    A.a(chǎn)broad                    B..a(chǎn)board    C.board      D.broad

試題詳情

22.______, a man who expresses himself effectively is sure to succeed more rapidly than a man whose command of English is poor.

    A.Other things being equal                    B.Other things be equal

    C.To be equal to other things                   D.Other things to be equal

試題詳情

第一節(jié):?jiǎn)雾?xiàng)填空(共15小題;每小題1分,滿分15分)從A、B、C、D四個(gè)選項(xiàng)中,選出可以填入空白處的最佳選項(xiàng)。

21.-----Shall we go to the art exhibition right away?

    -----_____.

    A.It’s your opinion.              B.I don’t mind.             

    C.It’s all up to you.              D.That’s your decision.

試題詳情

53.實(shí)驗(yàn)是生物學(xué)學(xué)習(xí)的一項(xiàng)重要內(nèi)容,結(jié)合所學(xué)實(shí)驗(yàn)分析回答下列問題。

  (1)在“DNA與RNA在細(xì)胞中的分布”實(shí)驗(yàn)中,所有的染色劑是     ,選用8%鹽

酸的作用是     。

  (2)分離獲取細(xì)胞質(zhì)中各種細(xì)胞器的方法是      ;制備細(xì)胞膜時(shí),所采用的方法

叫做      。

  (3)Grimton曾觀察到:饑餓的原生動(dòng)物的粗面內(nèi)質(zhì)網(wǎng)減少,或幾乎完全消失,高爾基

體的形成停止,由于這些細(xì)胞于實(shí)驗(yàn)期間還繼續(xù)形成分泌小泡,所以每一個(gè)高爾基

體的囊的數(shù)目減少了,但當(dāng)給動(dòng)物重新喂食后,形成了新的粗面內(nèi)質(zhì)網(wǎng),同時(shí)產(chǎn)生

新的高爾基體,囊的能力也恢復(fù)了。高爾基體的構(gòu)建和數(shù)目變化為什么與內(nèi)質(zhì)網(wǎng)一

致呢?

①你的假說:              。

②實(shí)驗(yàn)設(shè)計(jì)與實(shí)施: 略。

  (4)在歐美,洋蔥被譽(yù)為“蔬菜皇后”。其肥大的鱗莖中含糖類、維生素及各種礦質(zhì)元素

等,是不可多得的保健食品。那么洋蔥肥大的鱗莖中所含的糖是淀粉還是還原糖?

某生物學(xué)興趣小組的同學(xué)以此作為研究課題。請(qǐng)你完成下面的實(shí)驗(yàn)研究報(bào)告!

①實(shí)驗(yàn)?zāi)康模禾骄垦笫[肥大的鱗莖中所含的糖是淀粉還是還原糖!

②實(shí)驗(yàn)原理:

a.                               

b.                              

試題詳情


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