鉴别生物种类的一个常用工具是______，它是科学家根据生物类群存在的相似和相异的特点，把生物分类过程记录下来而编制的，我们可以利用它来识别不知名的生物。

翻译。

1. They would like to buy some _____ ( 生活必需品) this morning.

2. Pass me the two _____ (杂志) on the desk, please.

3. What is the _____ (价格) of the sweater?

4. Li Ming is taller than _____ (其他的) student in the class.

5. Can you show me any _____ (例子) for your question?

6. She works in _____ (广告业).

7. Yesterday the plane landed _____ (安全), and nobody hurt.