剑桥国际商务英语证书BEC的全称是International Business English Certificate,其考试是由英国剑桥大学考试委员会推荐、国家教委考试中心承办的权威性考试.该考试每年5月和11月举办两次,现已在全国40多个大中城市同时举办BECl、BEC2、...剑桥国际商务英语证书BEC的全称是International Business English Certificate,其考试是由英国剑桥大学考试委员会推荐、国家教委考试中心承办的权威性考试.该考试每年5月和11月举办两次,现已在全国40多个大中城市同时举办BECl、BEC2、BEC3三种级别的考试.展开更多
Since the 1950s, discourse analysis has gained achievements, and has drawn world-wide attention. However, few researches have been carried out in the field of text linguistics on BEC2, especially on the sentence-filli...Since the 1950s, discourse analysis has gained achievements, and has drawn world-wide attention. However, few researches have been carried out in the field of text linguistics on BEC2, especially on the sentence-filling section. The intention of this study is to high-light the cohesive functions in the sentence-filling section in BEC2, and tries to obtain some first-hand materials in order to carry out fur-ther and in-depth studies in this area in order to improve the student’s testing performance. Specially, the purpose is to find out the fre-quency of cohesive devices in the sentence-filling section in BEC2 and to find out how these cohesive devices contribute to students’ per-formance in it.展开更多
商务英语证书BEC(Business English Cer-tificate)是英国剑桥大学考试委员会专门为非英语国家的人员进行国际商务活动的需要而设计的,它根据商务工作的实际需要,对考生在商务和一般生活环境下使用英语的听、说、读、写四个方面进行全面...商务英语证书BEC(Business English Cer-tificate)是英国剑桥大学考试委员会专门为非英语国家的人员进行国际商务活动的需要而设计的,它根据商务工作的实际需要,对考生在商务和一般生活环境下使用英语的听、说、读、写四个方面进行全面考核。BEC证书可供各涉外机构、三资企业、跨国公司等单位录用、晋升员工时参考使用,并由于其权威性和实用性,已经受到越来越多的商务工作人员、大学生的青睐。本文拟对中级商务英语证书(BEC2)的考试题型作一详细介绍。展开更多
The coupled Gross–Pitaevskii equations for two-species BEC have been solved analytically under the Thomas-Fermi approximation(TFA). Based on the analytical solution, two formulae are derived to relate the particle nu...The coupled Gross–Pitaevskii equations for two-species BEC have been solved analytically under the Thomas-Fermi approximation(TFA). Based on the analytical solution, two formulae are derived to relate the particle numbers N_A and N_B with the root mean square radii of the two kinds of atoms. Only the case that both kinds of atoms have nonzero distribution at the center of an isotropic trap is considered. In this case the TFA has been found to work nicely. Thus, the two formulae are applicable and are useful for the evaluation of N_A and N_B.展开更多
文摘剑桥国际商务英语证书BEC的全称是International Business English Certificate,其考试是由英国剑桥大学考试委员会推荐、国家教委考试中心承办的权威性考试.该考试每年5月和11月举办两次,现已在全国40多个大中城市同时举办BECl、BEC2、BEC3三种级别的考试.
文摘Since the 1950s, discourse analysis has gained achievements, and has drawn world-wide attention. However, few researches have been carried out in the field of text linguistics on BEC2, especially on the sentence-filling section. The intention of this study is to high-light the cohesive functions in the sentence-filling section in BEC2, and tries to obtain some first-hand materials in order to carry out fur-ther and in-depth studies in this area in order to improve the student’s testing performance. Specially, the purpose is to find out the fre-quency of cohesive devices in the sentence-filling section in BEC2 and to find out how these cohesive devices contribute to students’ per-formance in it.
文摘商务英语证书BEC(Business English Cer-tificate)是英国剑桥大学考试委员会专门为非英语国家的人员进行国际商务活动的需要而设计的,它根据商务工作的实际需要,对考生在商务和一般生活环境下使用英语的听、说、读、写四个方面进行全面考核。BEC证书可供各涉外机构、三资企业、跨国公司等单位录用、晋升员工时参考使用,并由于其权威性和实用性,已经受到越来越多的商务工作人员、大学生的青睐。本文拟对中级商务英语证书(BEC2)的考试题型作一详细介绍。
基金Supported by the National Natural Science Foundation of China under Grant Nos.11372122,11274393,11574404,and 11275279the Open Project Program of State Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,China+1 种基金the National Basic Research Program of China(2013CB933601)Guangdong Natural Science Foundation(2016A030313313)
文摘The coupled Gross–Pitaevskii equations for two-species BEC have been solved analytically under the Thomas-Fermi approximation(TFA). Based on the analytical solution, two formulae are derived to relate the particle numbers N_A and N_B with the root mean square radii of the two kinds of atoms. Only the case that both kinds of atoms have nonzero distribution at the center of an isotropic trap is considered. In this case the TFA has been found to work nicely. Thus, the two formulae are applicable and are useful for the evaluation of N_A and N_B.
