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What are the uses of a touchpad?
It can be substituted for a mouse, very easy to use
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How does touchpads use sensors?
What touch pads sense is heat and pressure. For example, if you place a pen on the touch pad of a laptop or other computer, it will not do anything but if you touch it with your finger, it will work.
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When to use has and when to use is?
Using " Has " is referred a past tense. Such as: He has taken the garbage out already. Using " Is " for example is referred a Present tense. Such as: He is taking out the garbage.
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When to use for and when to use to?
A drawbridge allows welcome guests into a castle to cross the moat(a trench of water that goes around the perimiter of the castle)
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When to use in and when to use or?
You use "in" when you mean "in" and you use "or" when you need to use "or". It is rather difficult to construct rules for the use of prepositions in most languages.The grammatical structure of the...