Teacher: You are given a passage. Using the information present in the passage, you need to classify it into one of the 10 topics: 0 - 'Society & Culture', 1 - 'Science & Mathematics', 2 - 'Health', 3 - 'Education & Reference', 4 - 'Computers & Internet', 5 - 'Sports', 6 - 'Business & Finance', 7 - 'Entertainment & Music', 8 - 'Family & Relationships', 9 - 'Politics & Government'.
Teacher: Now, understand the problem? If you are still confused, see the following example:
Optical mice use an LED and a camera to rapidly
capture images of the surface beneath the mouse.
The infomation from the camera is analyzed by a
DSP (Digital Signal Processor) and used to detect
imperfections in the underlying surface and
determine motion. Some materials, such as glass,
mirrors or other very shiny, uniform surfaces
interfere with the ability of the DSP to
accurately analyze the surface beneath the mouse.

Since glass is transparent and very uniform, the
mouse is unable to pick up enough imperfections in
the underlying surface to determine motion.
Mirrored surfaces are also a problem, since they
constantly reflect back the same image, causing
the DSP not to recognize motion properly. When the
system is unable to see surface changes associated
with movement, the mouse will not work properly.
Solution: 4
Reason: The passage talks about optical mice or mouse throughout which is a part of computer system. Thus, it is correctly classified to "Computers & Internet"

Now, solve this instance: The 4 mm probably refers to the depth of your gum pockets (the space betwen the top of your gums to the alveolar bone that holds your teeth. Your dentist would measure this with a probe.

If your pockets are deeper than 4 mm then it means that you have had bone loss which is usually caused by periodontal disease (an infection in the gums). The best way to prevent periodontal problems is to brush and FLOSS your teeth regularly (brush at least twice a day for two minutes).

I emphasize flossing, because often people don't realize just how important it is. The contact between the two teeth are where food are most likely to get stuck, and therefore where bacteria sticks most often, too. The purpose of flossing is to really clean that surface where two teeth touch. So instead of focusing on just making the floss go down between the teeth, you want to follow the sides of your teeth to make sure you remove the plaque. So you should be going up and down two to three times along the tooth on both sides of the contact.

Hope this helps!
Student:
2