一侧面部肌肉反复性阵发性不自主抽搐称为（）。
A.面肌麻痹
B.半面痉挛
C.面肌瘫痪
D.习惯性半面痉挛
E.癫癎性半面痉挛
参考答案：B
I _______ Mr. Li many times already. I'm sure he isn't at home.[ ]
A. will phone
B. have phoned
C. phone
D. phones
如何减少自动闭塞架空线对通信线路的干扰影响？
