【判断题】If ζ=1 , then the two roots will be ; the system is called critically damped; that means the two roots of the system are on the imaginary axis (As shown in figure).
【简答题】Can you find out the meaning of the following roots in English and give two of three words that contain each of them? 能否指出下列英语词根的含义并分别举出两三个包含这些词根的单词?