In detecting clues to the presence of hazardous materials at the scene of an incident, using the sense of touch, taste, or is not recommended

What are economic systems and how do they differ?

How did the growth of the middle class affect social reform during the industrial revolution?

Which of the following would be of greatest concern to a speaker in presenting to children? choose only two. 1. age 2. expectation 3. ethnicity 4. knowledge 5. gender