"They not only make it    2      to sleep at night, butthey are    2   damage to our houses and shops of historic   3      ,"said John Norris, one of the protesters.   [    ]

1. A. terrible                  

    B. difficult        

    C. uncomfortable            

    D. unpleasant

2. A. doing    

    B. raising      

    C. putting      

    D. producing    

3. A. scene    

    B. period      

    C. interest

下列哪种原因引起的伪影在头颅CT检查中可以忽略（）

A.心跳和呼吸

B.岩骨

C.头部金属固定器

D.患者躁动

E.义齿