The study is the first of its kind to examine the connection between teacher-|||-burnout and students`cortisol levels(可体松水平),which are a biological indicator of stress.-|||-Researchers collected sal唾液)samples from over 400 elementary school childre and-|||-tested their cortisol levels. They found that in classrooms in which teachers experienced more-|||-burnout, or feelings of emotional exhaustion,students`cortisol levels were elevated. Higher-|||-cortisol levels in elementary school childre have been linked to learning difficulties as well as-|||-mental health problems.-|||-"This suggests that stress contagion might be taking place in the classroom among students-|||-and their teachers,"said Eva Oberle,the study`s lead author and newly appointed assistant-|||-professor with the Human Early Learning Partnership(HELP) at UBC`s school of population and-|||-public health. "It is unknown what came first-elevated cortisol or teacher burnout.We consider-|||-the connection between student and teacher stress a cyclical problem in the classroom."-|||-Oberle said a stressful classroom clima could be a result of inadequate support for teachers,-|||-which may impact teachers` ability to effectively manage their students.A poorly managed-|||-classroom cantribute to students` needs not being met and increasing stress.This could be-|||-reflected in elevated cortisol levels in students.-|||-Altematively, stress coul originate from students,who may be more challenging to teach-|||-because of increases in anxiety,behavioural problems,or special needs.In this scenario,teachers-|||-could feel overwhelmed and report higher levels of burnout.-|||-"Our study is a reminder of the systemic issues facing teachers and educators as classroom-|||-sizes increase and supports for teachers are cut,"said Oberle.-|||-"It is clear from a number of recent research studies that teaching is one of the most stressful-|||-professions, and that teachers need adequate resources and support in their jobs in order to battle-|||-bumout and alleviate stress in the classroom," said UBC education pressor Kimberl-|||-Schonert-Reichl, the study`s co-author and director of HELP."If we do not support teachers,we-|||-risk the collateral damage of students."-|||-1.Which is the best title for the passage?-|||-A.How to Relieve Stress in the class-|||-B.A Puzzling Question of Egg and Children-|||-C.The most Stressful Profession in the world-|||-D.The Link Between Students Stress and Teacher Burnout-|||-2.Paragraph4 and paragraph5 are intended to make it clear that-|||-A.teacher burnout may be the cause of the elevated cortisol levels in student-|||-B.the connection students and teacher stress is a cyclical problem-|||-C.students with higher stress level are more likely to have learning difficulties-|||-D.students` behavioural problems may result in teacher`s higher level of burnout-|||-3.According to the writer,many British teacher face the problem that-|||-A.teachers are not well trained to deal with students` problem-|||-B.teachers`income increases but teaching resources are cut-|||-C.there are more students in each class and less support for teachers-|||-D.there is a widening gap between students` need and teachers` ability-|||-4.Which of the following statement is NOT true?-|||-A.The more bumout teachers experienc ,the higher cortisol levels in students.-|||-B.Adequate support may help teachers manage students effective-|||-C.Students will benefit as a result of reduced teacher burnout.-|||-D.High cortisol levels indicates high level of burnout.