右侧喉返神经麻痹常见的原因是()
A.肺门淋巴结结核
B.肺中叶占位性病变
C.主动脉病变
D.右肺尖结核
E.以上都不对
参考答案:D
In the last few years, we have made great progress________telecommunication.[ ]
A. in area of
B. in field of
C. in the area of
D. on the field of
GB150-2011《压力容器》规定,压力容器无损检测档案应完整,保存时间不得少于容器设计使用年限。