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Q. |
Ultrasound with frequencies ranging from |
A. | -30 kHz to 3000 kHz |
B. | 20 kHz to 2000 kHz |
C. | 1-0 kHz to 1000 kHz |
D. | 40 kHz to 4000 kHz |
Answer» B. 20 kHz to 2000 kHz |
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