早期慢性肺源性心脏病的诊断依据是()。
A.长期肺、支气管疾病史
B.发绀
C.双肺干、湿啰音
D.肺动脉高压及右心室增大征象
E.高碳酸血症
参考答案:D
苗族食用油不包括()。
A.动物油
B.茶油
C.菜油
D.花生油
The details of any language system is passed on from one generation to the next through (), rather than by instinct.
A.learning
B.teaching
C.books
D.both A and B