A. at 4,000 F, at sea level B. at 4,000 F, 5,000 feet below sea level C. at the exact center of the earth at 4,000 F D. at 4,000 F, 5,000 feet above sea level
A. 1个 B. 2个 C. 3个 D. 4个
A. 83.4kN/m2 B. 96.7kN/m2 C. 105.7kN/m2 D. 114.9kN/m2