The propagation of radio signals is greatly influence by
A. troposphere
B. ionosphere
C. exosphere
D. thermosphere
Answer: Option B
A. troposphere
B. ionosphere
C. exosphere
D. thermosphere
Answer: Option B
Yokohama and Kobe are the main centres of ship building industry in:
A. Japan
B. South Korea
C. North Korea
D. China
A. Central America and Pacific Plate.
B. North America and Pacific Plate.
C. South America and Pacific Plate.
D. None of Above.
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