肩关节脱位时，肱骨头最容易脱出的方向是（）。
A.前方
B.外侧
C.内侧
D.上方
E.后方
参考答案：A
A dozen ideas were considered _______ the chief architect decided on the design of the new buildings
of our school. [ ]
A. before
B. whether
C. unless
D. because
钢不具有（）特性。
A．塑性
B．韧性
C．可锻性
D．脆而硬
