上海印刷机械行业协会:一辆客车长190，一辆货车290，两车长比为5：3，两车同向行驶交叉为1分钟，相向行驶交叉多少分钟？

设货车车长为3X，客车的车长为5X，
得出方程
（290-190）*1=5X+3X
得出X=25/2

相向行驶交叉
（25/2*（3+5））/（190+290）
=100/480

分钟
。

medium of communication in modern society. The translation of advertisement must be accurate and fluent. Accuracy in the translation of advertisement lies in its pragmatic meaning.
It is a new developing interpreter field that the advertisement translates. With the integration of global economy, enterprises have participated in the international market competition extensively, deeply day by day in products, service and brand of enterprises in our country. The tactics of international marketing including foreign advertising is being paid attention to. However, we must know the fact that our country enterprise's international competition has inadequate experience. And international marketing are scarce, especially in advertisement of the foreign language