A. 40. B. 57. C. 05. D. 10.
A. 8400m. B. 8900m. C. 8100m. D. 6300m.
At 6000m or above. B. At 6000m or below. C. At 6600m or above. D. At 7500 or below
At 52. B. At 52 or later C. At 52 or earlier D. Before 52.
A. TWA B. PTA C. BVL D. WRY
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