有利于气道阻塞早期诊断的肺功能指标是()
A.FEV1/FVC
B.RV/TLC
C.MMFR
D.最大呼气流速-容量曲线
E.FEV3/FVC
参考答案:D
We're just trying to reach a point ______ both sides will sit down together and talk.[ ]
A. where
B. that
C. when
D. which
健美操队形设计有哪些原则?