Notuntilrecently_____thatThompsonhadbentellingthetruthallalong
气体在一次循环过程中从高温热源吸热200J，向低温热源放热150J，则一次循环过程中气体对外做功为()
Expertshavefoundthatnormalsleepcanbedividedintofive______stages
Whentheshiplostitsenginepower,thecrewfoundthemselvesatthe_________ofthewind.
Thefixedstarwasaplanet.（）
