结构的可靠性状态包括（）
A.足够的强度
B.足够的刚度
C.满足稳定性的要求
D.安定性
E.抗震性
参考答案：A, B, C
下列哪些是“爪形手”的病变()
A．掌指关节背屈畸形
B．指间关节畸形
C．示指不能屈曲
D．中指不能屈曲
E．拇内收畸形
To their disappointment, the couple _______ the house but couldn't find the missing ring, which was to
bring them into great trouble. [ ]
A. got through
B. went through
C. lived through
D. looked through
