I know it's useless to disagree with Official answers and all that, but please allow me,
Q32.
The official answer is D, but it says "When weather balloons indicatelow air temperature and pressure. " so, same level of temp and pressure.
according to the text,
"One source of error is refraction, the bending of light beams as they pass through airlayers of different temperature and pressure. " so the refraction is the result of passing through DIFFERENT T and P, Therefore
...
Q32.
The official answer is D, but it says "When weather balloons indicatelow air temperature and pressure. " so, same level of temp and pressure.
according to the text,
"One source of error is refraction, the bending of light beams as they pass through airlayers of different temperature and pressure. " so the refraction is the result of passing through DIFFERENT T and P, Therefore
...
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