腱鞘炎较少出现的症状是：（）
A.关节主动活动障碍
B.有弹响
C.疼痛
D.局部有小结节
E.皮肤红、肿、热
参考答案：E
—They are quiet, aren’t they?
—Yes. They are accustomed ______ at meals.
A．to talk
B．to not talk
C．to talking
D．to not talking
头顶球分为前额正面头顶球和前额甩头头顶球。
