牙本质所含无机物约占重量的()
A.50%
B.60%
C.70%
D.80%
E.90%
参考答案:C
男,36岁,5年前咳嗽、咳痰、痰中带血,曾胸片检查右上肺病灶,抗结核治疗8个月后停药,复查胸片发现病灶钙化,今日出现咯血,量约200ml
该患者确诊最有价值的检查是().
A.胸部正侧位片
B.胸部高分辨CT检查
C.痰培养
D.痰找抗酸杆菌
E.支气管动脉造影
That so-called football fan doesn’t even know the main difference between the two football teams, _____ surprises all of the people at present.
A.which
B.what
C.that
D.where