凡是发生于颈部或耳之前后的一类岩证，面容憔悴，形体消瘦称之为（）。
A．石瘿
B．失荣
C．石疽
D．瘰疬
E．肾岩
参考答案：B
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We often play computers games ______ the weekend.
A．at
B．of
C．in
D．to
