慢性阻塞性肺气肿的体征有()
A、叩诊为浊音
B、叩诊为鼓音
C、叩诊为实音
D、叩诊为过清音
参考答案:D
---It is what parents say and do that really matters in children’s character training.
---______.
A.Properly
B.Doubtfully
C.Simply
D.Absolutely
异步电动机在不稳定运行区范围内,()随()的增大而减小。