因为，这样做会让大部分差生流入教育质量最差的学校，导致社会不公平的情况加剧，对该国的整体教育质量会产生负面影响。
It found that this could trap the most disadvantaged students in the least successful schools, thereby exacerbating social inequality and negatively impacting a nation's overall performance.
美国教育考试服务中心(ets)是一家非营利性机构，致力于向全球的各类人士提供公正有效的测评、研究及相关服务，提高教育质量和公平性。
ETS is a nonprofit institution with the mission to advance quality and equity in education by providing fair and valid assessments, research and related services for all people worldwide.
美国教育考试服务中心(ets)是一家非营利性机构，致力于向全球的各类人士提供公正有效的测评、研究及相关服务，提高教育质量和公平性。
ETS is a nonprofit organization with the mission to advance quality and equity in education by providing fair and valid assessments, research and related services for all people worldwide.
美国教育考试服务中心(e ETS)是一家非营利性机构，致力于向全球的各类人士提供公正有效的测评、研究及相关服务，提高教育质量和公平性。
ETS is a nonprofit organization with the mission to advance quality and equity in education by providing fair and valid assessments, research and related services for all people worldwide.
美国教育考试服务中心(% ETS)是一家非营利性机构，致力于向全球的各类人士提供公正有效的测评、研究及相关服务，提高教育质量和公平性。
ETS is a nonprofit institution with the mission to advance quality and equity in education by providing fair and valid assessments, research and related services for all people worldwide.
它包括教育机会公平、教育过程公平和教育质量公平。
It includes equality in education opportunities, education process and education equitable quality.
它包括教育机会公平、教育过程公平和教育质量公平。
It includes equality in education opportunities, education process and education equitable quality.
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