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27.If you take sleeping pills for a long time, you will____  them.

     A.be addicted to  B.be attracted to    C.be devoted to     D.be exposed to

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26.The accident that happened at an oilfield____ the southeast coast of the U.S.A has caused great damage to the environment.

     A.away             B.from        C.off              D.beyond

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25.It is the discovery of Cao Cao's tomb, _____ was made in Anyang, Henan province, ____ has received widespread attention.

     A.where; which                         B.where; that  

     C.that; which                        D.which; that

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24.There   a trend that 3D films will become more popular ever since the film Avatar hit the market.

     A.has arisen        B.arose             C.is arising          D.will arise

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23.When _____ a job, you should highlight your experience and skills.

     A.applying to                          B.applied to  

     C.applying for                        D.applied for

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22.Football fans are always arguing over those ____ goals in the World Cup.

     A.confidential       B.controversial   C.contemporary     D.contradictory

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34.(7分)下图为某同学利用紫色洋葱表皮作为实验材料,观察植物细胞质壁分离与复原的基本操作步骤。请据图回答:

  (1)你认为该实验有无对照实验     (有/无)。

  (2)B步骤主要观察洋葱鳞片叶表皮细胞中紫色     的大小以及     (原生质层/原生质体)的位置。

  (3)C步骤中吸水纸的作用是     

  (4)在F步骤时,若观察发现质壁分离不能复原,最可能的原因是       

  (5)某同学认为紫色洋葱表皮细胞体积较大,容易观察,还可用于观察染色体数目的变化。你认为该同学实验能否成功?     原因是:          

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