电气平面图是把整个工程的供电线路用单线连接形式示意性地表示的线路图。( )
参考答案：错
It is important to have your eyes examined regularly to check for any sign of eye disease that may not
have any ________. [ ]
A. symptom
B. similarity
C. sample
D. shadow
Son mari _____ avocat ni médecin.
A．est
B．n’est
C． n’est ni
D．est ni
