在混合作业的现场，焊接设备、线路要用（）法予以保证安全。
A、掩埋
B、屏护护栏
C、继电保
D、护器
参考答案：B
Having a trip abroad is certainly good for the old couple, but it remains ____whether they will enjoy it. [ ]
A. to see
B. to be seen
C. seeing
D. seen
茅台镇传统酱香酒的勾兑流程是什么？
