题目内容

对于危险物品，例如易燃品、有毒品或易爆炸物品等，在外包装上必须醒目标明，以示警告，称为指示性标志。

查看答案

搜索结果不匹配？点我反馈

更多问题

It is creative and professional as well to invite a lecturer from teaching area to speak on national security, because it is good to have various voices.

Your professor is very busy, so you can write the letter of recommendation yourself and ask your professor to sign it.

在慕课课程中，因为需要照顾到多种语言背景的学习者，所以发帖要尽量做到通俗易懂又不失学术严谨。

The irrelevant issues can waste time and make the goal inaccessible.