Question:
Goal: How do you inflate your bike tires?

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
You can plug a bike pump into the nozzle of the bike tire and pump air in until the tire is hard.

Question:
Goal: to determine the center of 4x4 plywood

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
make two lines from the corner to the opposite corner, mark the point where two lines cross each other

Question:
Goal: How can you prevent the drill from slipping away while drilling copper plate?

Which of the following methods is more reasonable for accomplishing this goal?
Answer:
Make an indentation with a hammer and a nail to guide the drill.