PreTest 2 : 1st Law for Closed System

Opened: Saturday, 24 January 2015, 2:00 PM
Closed: Saturday, 24 January 2015, 5:59 PM
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Attempts allowed: 3

Thời gian làm bài: 1 giờ 30 phút

Cách chấm điểm: Lần cao nhất