下列哪种疾病会使纵隔扑动()
A.进行性血胸
B.闭合性气胸
C.张力性气胸
D.肺爆裂伤
E.多根多处肋骨骨折
参考答案:E
Cindy has come to a new school where she doesn't _____, so she feels lonely and unhappy. [ ]
A. catch up
B. show up
C. fit in
D. put up
下面哪些是动力特性试验测定方法()
A.脉冲法
B.共振法
C.比较测定法
D.自由共振法
E.间接测定法