室外燃气管道安装工程中，铸铁管与钢管之间的连接应采用()。
A.法兰连接
B.M型机械接口
C.承插连接
D.S型机械接口
参考答案：A
The goods which are carried into and out of the territory by the same vessel or aircraft are defined as
A．transit goods B．transshipment goodsC．through goods D．import and export goods
"网点撤站，正确的操作顺序是：（）
①网点提供退款申请表及欠票的相关资料
②总部核实具体欠票金额及退款金额
③网点需将所有再库库存清理完毕
④总部协助走撤站退款流程
A.①②③④
B.②③①④
C.④③①②
D.③②①④
