可逆循环的热效率都相等,这说法是否有错,错在何处?
参考答案:
错在没有加条件,如改成:在相同T1和相同T2的可逆循环的热效率都相等,这就对了。
转K6型转向架侧架导框内侧面磨耗大于()或组装间隙超限时,须堆焊后加工。
The ancient Jewish people regarded themselves as the salt of the earth , the chosen few by God to rule the world.
A.outcast
B.elite
C.nomad
D.disciple