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1. |
How is the heat transfer fluid (HTF) heated in bubble pump systems? |
A. | By subjecting the closed HTF circuit to high pressure |
B. | By subjecting the closed HTF circuit to high pressure and by increasing the volume |
C. | By subjecting the closed HTF circuit to low pressure and by decreasing the volume |
D. | By subjecting the closed HTF circuit to low pressure |
Answer» E. | |