兆欧表连接接线柱与被测物之间的两根导线不能用绞线，应分开单独连接，以防止因绞线绝缘不良而影响读数。
浅埋隧道与围岩及初期支护变形过大或变形不收敛的隧道衬砌有何规定？
Coast Guard approved buoyant work vests（）. ["may be substituted for 10 percent of the required life preservers","should be stowed adjacent to lifeboats and emergency stations","may be used by boat crews and line handlers during lifeboat drills","should be used when carrying out duties near a weather deck's edge"]
Cargo vessels being navigated，and fitted with emergency lighting and power systems，shall have their emergency systems tested at least once（）. ["a month","in each week","in every 6 months","in every 12 month"]
浇筑隧道拱圈等长筒形混凝土结构时有何要求？
深埋隧道二次衬砌作有何要求？
