人体中结构最复杂的关节是（）？
A.肩关节
B.膝关节
C.踝关节
D.髋关节
参考答案：B
三轴试验时，最小主应力方向和破裂面的夹角为
A.45°+φ/2
B.45°-φ/2
C.45°
Advertisers are now forbidden to __________ the public with false claims.[ ]
A.cheat
B.deceive
C.trick
D.check
