起于下颌骨颏下棘的肌肉是（）
A.二腹肌
B.下颌舌骨肌
C.颏肌
D.颏舌肌
E.颏舌骨肌
参考答案：E
_______ which way to take, the little boy behaved like a real gentleman who comforted his sister from time to time.
A．Leaving to wonder
B．Having left to wonder
C．Left wondering
D．Left to wonder
某市电信局在安装电话这项服务中，只允许消费者购买并使用其指定的电话机，否则不予安装，其行为侵犯了消费者的( )。
A．保障安全权 B．自主选择权 C．公平交易权 D．维护尊严权
