0  436861  436869  436875  436879  436885  436887  436891  436897  436899  436905  436911  436915  436917  436921  436927  436929  436935  436939  436941  436945  436947  436951  436953  436955  436956  436957  436959  436960  436961  436963  436965  436969  436971  436975  436977  436981  436987  436989  436995  436999  437001  437005  437011  437017  437019  437025  437029  437031  437037  437041  437047  437055  447090 

27.The red flag looks extremely beautiful     the blue sky and white clouds.

    A.through       B.a(chǎn)cross         C.a(chǎn)gainst       D.beyond

試題詳情

26.How long do you think __________ the computer company turns out a new product?

    A.it will be that                    B.will it be until               

    C.will it be since                 D.it will be before

試題詳情

25.- Good morning.How much should I pay for these books __________ to Alabama?

    - Hmm, about ten dollars.

    A.to be sent     B.being sent     C.sent          D.having been sent

試題詳情

24.China’s new food law provides for a food recall system __________ producers have to stop production if their food isn’t up to standards.

    A.where        B.that          C.when                  D.which

試題詳情

23.- Do you think the weather is good enough for the picnic?

    -Yes.You couldn’t hope for __________ day at this time of the year.

    A.a(chǎn) nice        B.the nice       C.a(chǎn) nicer                  D.the nicest

試題詳情

22.- What about Mr.Brown’s speech?

    - I understood most of what he said, but not __________ word.

    A.a(chǎn)ny          B.each         C.every         D.one

試題詳情

第一節(jié)  單項(xiàng)填空 (共15小題;每小題1分,滿分15分)

    從A、B、C、D四個選項(xiàng)中,選出可以填入空白處的最佳選項(xiàng),并在答題卡上將該項(xiàng)涂黑。

例:It is generally considered unwise to give a child ___________ he or she wants.

    A.however      B.whatever      C.whichever     D.whenever

    答案是B。

21.- Really? Who will give __________ lecture next Saturday?

   - Mr.Wang, __________ professor from Nanjing University.

    A.the; 不填      B.the; a         C.a(chǎn); the        D.a(chǎn); a

試題詳情

40.(10分)干擾素常用于治療病毒感染引起的疾病,現(xiàn)在可以通過基因工程大量獲得。

請回答相關(guān)問題。

  (1)若已知干擾素的氨基酸序列,則獲取目的基因的較簡單方法是         

  (2)基因表達(dá)載體除含有干擾素基因外,還必須有               

         等。

  (3)如果受體細(xì)胞為受精卵,則此過程還涉及到動物細(xì)胞培養(yǎng)技術(shù),動物細(xì)胞培養(yǎng)的條件包括無菌、無毒的環(huán)境、營養(yǎng)、       、氣體環(huán)境,提供氣體中CO2的主要作用是           

  (4)轉(zhuǎn)基因技術(shù)是否成功,需要對受體細(xì)胞進(jìn)行分子水平的檢測,首先是檢測受體細(xì)胞染色體的DNA上是否插入目的基因,這是目的基因能否在真核生物中穩(wěn)定遺傳的關(guān)鍵,檢測的方法是         。最后,還要檢測目的基因是否翻譯成了相應(yīng)蛋白質(zhì),利用的技術(shù)是         。

  (5)2010年春,新疆的特大雪災(zāi)使大量羊凍死。有人就設(shè)想將魚的抗凍蛋白基因?qū)胙虻腳____________________中,培育抗寒能力更強(qiáng)的轉(zhuǎn)基因羊。那么培育該轉(zhuǎn)基因羊的最后一道“工序”是胚胎工程的          技術(shù)。

試題詳情


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