A:Yes, there is.
B:No, they aren't.
C:Yes, it is.
—It's seven o'clock. It's time to go _______.
—OK, let's go.
Things can go wrong when people work under s____ (pressure).
在我国西藏高原,有一个羊八井地热区,地热电厂 担负着拉萨市一部分电力供应。工作流程如图所示,经过地下井→汽轮机→发电机,其能量转化过程是将内能转化为 ____ 能再转化为____能。