. What are the factors we should consider when practicing the 14 learner-centered principles?

1. seasonal

2. frictional unenployment

3. the number of the labor force multiplied by 100 and then subtract the number of unemployed.

4. 4%

5. an increase in prices

answer; depression and breathing related sleep disorder(independent);

answer; the automatic system because it is a "gut reactor"  

answer; develops policy;