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

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

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

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

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

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


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

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

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


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

在实验室中，如将有毒食物喂给大鼠，使大鼠有几个小时的不适后，大鼠从此不再吃这种有毒食物了。这一现象属于动物的


  1. A.
    本能
  2. B.
    非条件反射
  3. C.
    条件反射
  4. D.
    印随

用15N标记含有200个碱基的DNA分子，其中有胞嘧啶60个，该DNA分子在14N的培养基中连续复制4次。下列有关判断不正确的是


  1. A.
    含有15N的DNA分子占1/8
  2. B.
    复制过程中需腺嘌呤脱氧核苷酸600个
  3. C.
    含有14N的DNA分子占7/8
  4. D.
    复制结果共产生16个DNA分子
 0  7128  7136  7142  7146  7152  7154  7158  7164  7166  7172  7178  7182  7184  7188  7194  7196  7202  7206  7208  7212  7214  7218  7220  7222  7223  7224  7226  7227  7228  7230  7232  7236  7238  7242  7244  7248  7254  7256  7262  7266  7268  7272  7278  7284  7286  7292  7296  7298  7304  7308  7314  7322  151629 

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