单项选择题
A.10.97,21.94 B.43.88,16.46 C.32.91,21.94 D.16.46,16.46
A.1.10N/mm2 B.1.39N/mm2 C.2.26N/mm2 D.1.78N/mm2
A.149kPa B.158kPa C.168kPa D.174kPa