A Carnot refrigerator is operated between two reservoirs and the cold<br/>reservoirs is at temperature of 270K. If in each cycle the<br/>refrigerator receives 415 J of heat energy from the reservoir at 270K<br/>and 77 J work is needed to be done on the working substance. The<br/>quantity of the heat energy delivered to the hot reservoir is (). A: 90J B: 338 J C: 492J D: 578J
A Carnot refrigerator is operated between two reservoirs and the cold<br/>reservoirs is at temperature of 270K. If in each cycle the<br/>refrigerator receives 415 J of heat energy from the reservoir at 270K<br/>and 77 J work is needed to be done on the working substance. The<br/>quantity of the heat energy delivered to the hot reservoir is (). A: 90J B: 338 J C: 492J D: 578J
莫高窟共有()个洞窟。 A: 490 B: 492 C: 494
莫高窟共有()个洞窟。 A: 490 B: 492 C: 494
492 . 色彩静物的暗部色调都是一样的
492 . 色彩静物的暗部色调都是一样的
《论语》一共多少章( ) A: 492 B: 356 C: 490 D: 465
《论语》一共多少章( ) A: 492 B: 356 C: 490 D: 465
敦煌莫高窟共有多少个洞窟()。 A: 490 B: 491 C: 492 D: 493
敦煌莫高窟共有多少个洞窟()。 A: 490 B: 491 C: 492 D: 493
《聊斋志异》全书共有短篇小说()篇。 A: 489 B: 490 C: 491 D: 492
《聊斋志异》全书共有短篇小说()篇。 A: 489 B: 490 C: 491 D: 492
甘肃敦煌莫高窟有_个洞 A: 192 B: 292 C: 392 D: 492
甘肃敦煌莫高窟有_个洞 A: 192 B: 292 C: 392 D: 492
公元()年,北魏孝文帝迁都洛阳。 A: 490 B: 491 C: 492 D: 493
公元()年,北魏孝文帝迁都洛阳。 A: 490 B: 491 C: 492 D: 493
4 ---------, -------- religious, cultural and intellectual influences, /the 492 cells and ----(圣所) in Mogao are famous for their statues and wall paintings, /---- 1,000 years of ----
4 ---------, -------- religious, cultural and intellectual influences, /the 492 cells and ----(圣所) in Mogao are famous for their statues and wall paintings, /---- 1,000 years of ----
莫高窟有壁画塑像的洞窟共()个。 A: 492 B: 735 C: 429 D: 560
莫高窟有壁画塑像的洞窟共()个。 A: 492 B: 735 C: 429 D: 560