Submitted on: 14 June 2013.
Revised on: 29 June 2013.
Accepted on: 13 July 2013.
Physical Review Physics Education Research
Submitted on: 07 November 2023.
Revised on: 19 November 2023.
Accepted on: 14 December 2023.
Physical Review Physics Education Research
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http://reply.papertrans.cn/3/247/24638/24638-14.png
Submitted on: 14 November 2022.
Revised on: 24 December 2022.
Accepted on: 01 January 2023.
Physical Review Physics Education Research
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Submitted on: 16 November 2011.
Revised on: 14 December 2011.
Accepted on: 26 December 2011.
Physical Review Physics Education Research
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Submitted on: 11 February 2016.
Revised on: 24 February 2016.
Accepted on: 18 March 2016.
Physical Review Physics Education Research
Submitted on: 01 July 2001.
Revised on: 30 July 2001.
Accepted on: 22 August 2001.
Physical Review Physics Education Research