Which kind of file should be used on soft materials?
A) Flat B) Curved tooth C) Knife D) Coarse
B
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What is an ion and how is it useful?
What will be an ideal response?
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Insecticides are the most efficient means ever devised to kill insects
Indicate whether the statement is true or false.
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For the following pairs of signals, determine if v? leads or lags v? and by how much.
 FIGURE 1.png)
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Split-system heat pumps have a third service valve that is not connected to either refrigerant line. This extra valve:
A) Is a backup in case one of the other service valves quits functioning. B) Is always connected to the low side of the system regardless of the operating cycle. C) Is used to read the defrost pressures during the defrost cycle. D) Is only needed during the cooling cycle.
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