异物被吸入气管后,最先表现的症状是:()
A.呼吸困难
B.剧烈呛咳、憋气、面色青紫
C.肺听诊啰音、哮鸣音
D.听诊声门下拍击音
E.心力衰竭
参考答案:B
She in a toy factory, but now she has a shop of her own.
A、is used to work
B、was used to work
C、used to work
正确的学习观念是高效学习行为的前提和基础。[ ]