偏航阻尼器系统提供指令通过下列哪一个舵面的运动去进行偏航阻尼()
A.副翼
B.副翼和扰流板
C.方向舵
D.扰流板
参考答案:C
Of the seven days in the a week, Saturday is said to be the most popular _____ for a wedding in some
countries. [ ]
A. way
B. situation
C. event
D. choice
男,23岁,左大腿远端疼痛,夜间明显,服阿司匹林可缓解,结合图像,最可能的诊断是()
A.骨脓肿
B.骨样骨瘤
C.骨化性纤维瘤
D.骨巨细胞瘤
E.骨肉瘤