• 2022-06-11 问题

    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

  • 2022-05-25 问题

    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

  • 2022-05-28 问题

    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

  • 2022-06-03 问题

    ‍《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

  • 2022-05-25 问题

    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

  • 2022-06-08 问题

    《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

  • 2022-05-26 问题

    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

  • 2022-05-29 问题

    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

  • 2021-04-14 问题

    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 ----

  • 2022-05-25 问题

    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

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