类风湿性关节炎可有以下哪些临床表现()
A．全身酸痛
B．低热
C．多关节肿痛
D．关节表现常为非对称性
E．贫血
参考答案：A, B, C, E
若|-a|=5，则a=______．
Yao Ming is one of the best players in NBA. We are all ______ him.[ ]
A. angry with
B. strict with
C. worried about
D. proud of
