After Trying Out Different Brands of Toothbrushes,Martin Has Decided That

question 73

Multiple Choice

After trying out different brands of toothbrushes,Martin has decided that he prefers Oral B the most.Whenever he is out grocery shopping,he always purchases several of these toothbrushes,to stock up in case the store runs out of it in the future.To Martin,Oral B toothbrushes are _____ offerings.

• A)shopping
• B)unsought
• C)specialty
• D)convenience
• E)impulse

---

Definitions:

Nosepiece

The part of a microscope that holds the objectives and can be rotated to change the magnification.

Objective Lenses

Lenses closest to the specimen in a microscope that magnify the image of the sample.

Focus Knobs

Controls on a microscope that adjust the clarity and sharpness of the specimen being viewed by moving the lenses closer or farther from the specimen.

Iris Diaphragm

A mechanical device, typically part of a camera or microscope, that controls the amount of light passing through a lens or onto a specimen.