This article illustrates that there is only third grade in“xie”initial consonant by detailed textual research of 46 rhyme words which are subordinated to it in Yunjing and their being proven by rhyme book and rhyme chart in the middle ancient times.

Means of lung function for SARS with three-equation method of measuring single breath carbon monoxide diffusing capacity;

On the base of researching local documents in Zhili of Qing dynasty,the paper further extends study to states and counties,and then reveals that the“original Ding”in most areas of Zhili was“three classes and nine ranks”converted to the lowest one.

It′s a new coupling structure of trisection cross-coupling;filters designed in this way will have some original superiority.