The present paper makes a short introduction about 8 kinds of teaching approaches and methods, later with a focus on the approach of Communicative Language Teaching (CLT). This paper first summarizes the characteristi...The present paper makes a short introduction about 8 kinds of teaching approaches and methods, later with a focus on the approach of Communicative Language Teaching (CLT). This paper first summarizes the characteristics of CLT, and after that gives the existing problems of CLT, and in the end a conclusion is made. The purpose of this paper is to make a clear understanding of CLT in order to provide some advice to carry out it.展开更多
In 1956, my former Head and Professor of the Department of Obstetrics and Gynecology KT LIM, asked me to take the initiative to establish a reproductive endocrinology unit. As China is a developing country, we wer... In 1956, my former Head and Professor of the Department of Obstetrics and Gynecology KT LIM, asked me to take the initiative to establish a reproductive endocrinology unit. As China is a developing country, we were then short of diagnostic facilities and therapeutic agents. We can learn basic knowledge and clinical experiences from the literature, but hormonal preparations were expensive and generally most of our patients were poor. We needed to find simpler, inexpensive and yet effective ways to treat our patients. In a word, we had to develop our own way.……展开更多
In the previous paper(see Li and Zhu(2014)), for a characteristic problem with not necessarily small initial data given on a complete null cone decaying like that in the work of the stability of Minkowski spacetime by...In the previous paper(see Li and Zhu(2014)), for a characteristic problem with not necessarily small initial data given on a complete null cone decaying like that in the work of the stability of Minkowski spacetime by Christodoulou and Klainerman(1993), we proved the local existence in retarded time, which means the solution to the vacuum Einstein equations exists in a uniform future neighborhood, while the global existence in retarded time is the weak cosmic censorship conjecture. In this paper, we prove that the local existence in retarded time still holds when the data is assumed to decay slower, like that in Bieri's work(2007)on the extension to the stability of Minkowski spacetime. Such decay guarantees the existence of the limit of the Hawking mass on the initial null cone, when approaching to infinity, in an optimal way.展开更多
文摘The present paper makes a short introduction about 8 kinds of teaching approaches and methods, later with a focus on the approach of Communicative Language Teaching (CLT). This paper first summarizes the characteristics of CLT, and after that gives the existing problems of CLT, and in the end a conclusion is made. The purpose of this paper is to make a clear understanding of CLT in order to provide some advice to carry out it.
文摘 In 1956, my former Head and Professor of the Department of Obstetrics and Gynecology KT LIM, asked me to take the initiative to establish a reproductive endocrinology unit. As China is a developing country, we were then short of diagnostic facilities and therapeutic agents. We can learn basic knowledge and clinical experiences from the literature, but hormonal preparations were expensive and generally most of our patients were poor. We needed to find simpler, inexpensive and yet effective ways to treat our patients. In a word, we had to develop our own way.……
基金supported by National Natural Science Foundation of China(Grant No.11271377)the Fundamental Research Funds for the Central Universities
文摘In the previous paper(see Li and Zhu(2014)), for a characteristic problem with not necessarily small initial data given on a complete null cone decaying like that in the work of the stability of Minkowski spacetime by Christodoulou and Klainerman(1993), we proved the local existence in retarded time, which means the solution to the vacuum Einstein equations exists in a uniform future neighborhood, while the global existence in retarded time is the weak cosmic censorship conjecture. In this paper, we prove that the local existence in retarded time still holds when the data is assumed to decay slower, like that in Bieri's work(2007)on the extension to the stability of Minkowski spacetime. Such decay guarantees the existence of the limit of the Hawking mass on the initial null cone, when approaching to infinity, in an optimal way.
