Nearby were two boats ____ they had come to the lonely island.
in which
暂无解析
采用硫酸酸洗的温度一般为（）℃。
顶棚抹灰前，应在四周墙上弹出水平线，以墙上水平线依据，先抹顶棚四周圈边找平。
腐蚀物品属于机要通信禁寄物品
机要件必须装入机要袋内发运，严禁散件外走。
室外抹灰工程施工，一般应自下而上进行。
