A Complete Collection of 100000 Whys
Fav十万个为什么
为什么不用刀切木头，而用锯锯木头？
不用刀切木头，而用锯锯木头，主要是因为锯的切割效率更高、锯更省力、锯的切口更平整。
1、锯的切割效率更高：锯由多个锯齿组成，每个锯齿都像一把小刀，在来回拉动过程中，多个锯齿同时参与切割，相比刀一次只能切割一点，锯的切割效率更高。
2、锯更省力：由于多个锯齿共同作用，以及锯齿的形状设计（如楔形），可以将施加的力分散并集中在切割点上，从而减少切割所需的力，相比用刀切更加省力。
3、锯的切口更平整：锯齿的规律性排列和切割动作，可以使切口更加平整，而刀切容易受力不均导致切口歪斜或产生毛刺。锯的切割方式更易于控制，能够获得更精确的切割效果。
总结：不用刀切木头，而用锯锯木头，主要是因为锯的切割效率更高、锯更省力、锯的切口更平整。
1. Questo strumento raccoglie una vasta quantità di domande e risposte per rispondere ai vostri dubbi quotidiani.
2. Digitate direttamente le parole chiave della domanda che desiderate cercare nella casella di ricerca qui sopra.
3. I dati di questo strumento sono stati raccolti dal web; se riscontrate degli errori, potete segnalarceli affinché possano essere corretti.
Recommended Tools
![Continuous date generator]()
Continuous date generator
Generate all dates between two dates
![Absolute value calculation]()
Absolute value calculation
Online absolute value calculation tool
![Online trapezoidal area calculator]()
Online trapezoidal area calculator
A small tool for online calculation of trapezoidal area
![Brinell hardness calculator]()
Brinell hardness calculator
Calculate Brinell hardness online through pressure, steel ball diameter, and indentation diameter
![Paper Weight and Thickness Conversion Tool]()
Paper Weight and Thickness Conversion Tool
Online conversion of paper weight and thickness
![Chinese Emperors of Various Dynasties Inquiry]()
Chinese Emperors of Various Dynasties Inquiry
Online query of emperors and their governing time throughout history
![24 solar terms query]()
24 solar terms query
Online query of the 24 solar terms time for any year
![Fart sound simulation]()
Fart sound simulation
Online fart sound simulation tool
![Loan annual interest rate, monthly interest rate, and daily interest rate calculator]()
Loan annual interest rate, monthly interest rate, and daily interest rate calculator
Online calculation of annual, monthly, and daily loan interest rates
![Online acquisition of website icons]()
Online acquisition of website icons
Get the Favicon icon of the specified website online
![Chinese character stroke practice]()
Chinese character stroke practice
Chinese character stroke order practice tool
![JS code obfuscation]()
JS code obfuscation
Online JavaScript code obfuscation tool
![Online JSON to Cookie Conversion]()
Online JSON to Cookie Conversion
Convert JSON format data to Cookie data online
![Convert PDF files to images]()
Convert PDF files to images
Convert PDF files to images online and download them
![PDF file page to long image conversion]()
PDF file page to long image conversion
Convert all pages in a PDF file to a single long image online
![PDF file page rotation]()
PDF file page rotation
Rotate PDF file pages online
![PHP Text Compression Tool]()
PHP Text Compression Tool
The gzencode() or gzcompression() functions in PHP compress text
![Tetris]()
Tetris
Online Tetris Mini Game
![Dinosaur, run fast]()
Dinosaur, run fast
A Google mini game called Dinosaur Run Online Trial
![Punycode encoding/decoding]()
Punycode encoding/decoding
Chinese domain name online Punycode encoding and decoding tool
![World Capital Search Tool]()
World Capital Search Tool
Online world capital online query tool
![Online Word Count]()
Online Word Count
Statistically analyze numbers/letters/Chinese characters/punctuation/etc. in a string
![Fetal weight calculator]()
Fetal weight calculator
Online tool for calculating fetal weight during pregnancy
![TripleDes encryption and decryption tool]()
TripleDes encryption and decryption tool
TripleDes online encryption tool/TripleDes online decryption tool
粤ICP备2021116614号