主动脉瓣关闭不全患者心浊音界是（）
A.梨形
B.靴形
C.烧瓶形
D.普大型
E.心底部增宽
参考答案：B
People often have the belief ________a healthy environment and development cannot be possible at the
same time, but this does not have to be true.[ ]
A. that
B. which
C. where
D. what
小调的音乐艺术特征是什么？
