合同被确认无效时，应从( )时即无法律约束力。
A．被确认
B．合同订立
C．当事人一方提出
D．双方发生争议
参考答案：B
She was born _______ July 4th and her birthday is coming soon.[ ]
A. in
B. on
C. at
D. for
以下哪项临床表现在风湿性疾病中不常见
A．关节肿胀
B．关节压痛
C．手掌指关节桡侧偏斜
D．晨僵
E．膝关节强直
