Which are the special requirements for mechanical design in a mechatronic system（）
A. high precision
B. small size
C. large rigidity
D. small moment of inertia
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When taking interrogation and examination task, police officers should wear uniform. If not in uniform, police officers should show the（）
A. identity cards
B. service cards
C. driving licenses
D. vehicle licenses
The second step in a routine car check is_____（）
A. to check the license
B. to stop the car
C. to confirm the driver’s information
D. to examine the items in the car
How should 110 operators respond when receiving a call（）
A. Take the initiative to help
B. Let P.R. （person reporting） calm down
C. Get the key points of a case
D. Ask P.R. to contact the local police station for help
Which statements shall the operator use when the call is put through（）
A. When and where did the case happen
B. What happened to you
C. This is 110. What can I do for you
D. Hello, this is emergency service center
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