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科目: 來源: 題型:單選題

The fire ________ in the supermarket during the busy time and claimed 100 lives.


  1. A.
    broke off
  2. B.
    broke out
  3. C.
    broke away
  4. D.
    broke in

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科目: 來源: 題型:單選題

The construction of Shanghai Subway No. 2 ________ the convenience of the traffic in the city.


  1. A.
    adds up to
  2. B.
    adds to
  3. C.
    adds
  4. D.
    is added to

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科目: 來源: 題型:單選題

This is the photo of the building which _______. How wonderful it is!


  1. A.
    is being built
  2. B.
    has been built
  3. C.
    will be built
  4. D.
    would be built

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科目: 來源: 題型:單選題

Nelson Mandela spent his time _______ in prison thinking about how to continue his fight for the black people’s freedom.


  1. A.
    locking
  2. B.
    to lock
  3. C.
    being locked
  4. D.
    locked

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科目: 來源: 題型:單選題

We hope you ________ with the gift we sent you last night.


  1. A.
    are satisfied
  2. B.
    are to satisfy
  3. C.
    will satisfy
  4. D.
    would satisfy

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科目: 來源: 題型:單選題

The headmaster will have the opening speech __________ by a student.


  1. A.
    deliver
  2. B.
    delivered
  3. C.
    delivering
  4. D.
    to deliver

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科目: 來源: 題型:單選題

New technology as well as new machines __________ been introduced in this company.


  1. A.
    have
  2. B.
    has
  3. C.
    is having
  4. D.
    having

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科目: 來源: 題型:單選題

This will enable the store to sell more, __________ greater success.


  1. A.
    achieve
  2. B.
    gain
  3. C.
    achieving
  4. D.
    succeeding

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科目: 來源: 題型:單選題

在實驗室中,如將有毒食物喂給大鼠,使大鼠有幾個小時的不適后,大鼠從此不再吃這種有毒食物了。這一現(xiàn)象屬于動物的


  1. A.
    本能
  2. B.
    非條件反射
  3. C.
    條件反射
  4. D.
    印隨

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科目: 來源: 題型:單選題

15N標(biāo)記含有200個堿基的DNA分子,其中有胞嘧啶60個,該DNA分子在14N的培養(yǎng)基中連續(xù)復(fù)制4次。下列有關(guān)判斷不正確的是


  1. A.
    含有15N的DNA分子占1/8
  2. B.
    復(fù)制過程中需腺嘌呤脫氧核苷酸600個
  3. C.
    含有14N的DNA分子占7/8
  4. D.
    復(fù)制結(jié)果共產(chǎn)生16個DNA分子

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