What are the main features of mechanisms（）
Assembly of man-made components
B. Determinate relative motions among different components
Can conduct work/energy conversion
D. Well designed shapes and structures
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rènshi nǐ hěn gāoxìng 认识 你 很 高兴 means（）
A. Nice to meet you
B. You are very happy
C. See you soon
D. Good morning
jīnɡlǐ hǎo 经理 好 means（）
A. Hello teacher
B. Hello manager
C. Hello friend
D. Hello classmate
provides an explanation for the origin of mass（）
A. Higgs mechanism
B. Yang-Mills gauge theory
C. The general theory of relativity
D. The special theory of relativity
The key technologies of TBMs include（）
A. Cutting efficiency without instability
B. Power transfer without unbalance
C. Sensing control without misalignment
D. Shape design without high cost
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