A.油燈 B.電石燈 C.汽燈 D.火把
A.車前上側(cè) B.車前下側(cè) C.車后上側(cè) D.車后下側(cè)
A.間斷鳴三次長(zhǎng)聲,即鳴30s、停、鳴30s、停、鳴30s B.間斷鳴一長(zhǎng)、一短三次,即鳴20s、鳴10s、停、鳴20s、鳴10s、停、鳴20s、鳴10s C.連續(xù)三短聲,即鳴10s、停、鳴10s、停、鳴10s D.一次長(zhǎng)聲,鳴60s