(判斷題)采用鉆爆法掘進(jìn)的巖石巷道,應(yīng)當(dāng)采用光面爆破。打錨桿眼前,必須采取敲幫問(wèn)頂?shù)却胧? ???)

　　(判斷題)采用鉆爆法掘進(jìn)的巖石巷道,應(yīng)當(dāng)采用光面爆破。打錨桿眼前,必須采取敲幫問(wèn)頂?shù)?a href=http://m.myworldofnumbers.com/jscs/ target=_blank class=infotextkey>措施。( )

　　A.正確

　　B.錯(cuò)誤