He loves junk food,          he tries to           only once a month.[ ]

A. but; eat              

B. but; eat them

C. and; eat              

D. but; eat it

颈动脉瘤超声诊断的依据是（）

A.颈动脉内径扩大，湍流

B.颈动脉内径正常大小，湍流

C.颈动脉内径正常大小

D.颈动脉内径扩大，湍流，镶嵌型血流信号

E.颈动脉内径正常大小，镶嵌型血流信号