掘进班组长在放完炮进入工作面后要做好工作不包括、协助瓦检员检查瓦斯和挂好监测探头。
参考答案：错
The two strangers talked as if they ____ friends for years.
A should be B would be C have been D had been
男，18岁，自幼有出血倾向。出血时间延长，凝血时间正常，血小板150×109/L，血小板粘附率降低，部分凝血活酶时间延长，凝血酶原时间正常。父亲也有类似病史，考虑的诊断是（）
A.血友病
B.血管性血友病
C.过敏性紫癜
D.维生素K缺乏
E.遗传性出血性毛细血管扩张症
The two strangers talked as if they ____ friends for years.