全球物流与国内物流特有的区别之一是报关和相关文书单据制成等活动。
参考答案：对
33．Before she______thethe door, she____what had happened to her computer．
A．walked;noticed
B．walked; had noticed
C．walks; has noticed
D．had walked; noticed
工业上常用电解氯化镁方法来生产金属镁：MgCl2通电Mg + Cl2↑。现电解950Kg氯化镁，最多能生产多少千克单质镁？
