涡喷发动机燃烧室出口温度沿径向分布规律为()
A.在距涡轮叶片叶尖三分之一叶高处,温度最高
B.叶尖处温度最高
C.叶根处温度最高
D.由叶根至叶尖温度不断增加
参考答案:A
评价外科病人的营养状态,最简单而实用的指标是()。
A.近期体重下降程度和三头肌皮褶厚度
B.血清转铁蛋白和视黄醇结合蛋白
C.握力和三头肌皮褶厚度
D.近期体重下降程度和血浆白蛋白水平
E.氮平衡试验
A vessel engaged in replenishment or transferring persons,provisions or cargo while under way can be regarded as().
A.a vessel restricted in her ability to maneuver
B.a vessel engaged in laying,serving or picking up a navigation mark,submarine cable or pipeline
C.a vessel not under command
D.a power-driven vessel