家用中央空调的主机和通风管都密封安装,维修麻烦吗?
参考答案:
维修简便。室内机下方吊顶上留有检修口,便于对室内机电气接线进行检修和更换。
Simon, ______ stand there. ______ in please. [ ]
A. don't ; Come
B. doesn't; Come
C. don't ; Comes
D. doesn't ; Comes
小车车轮直径偏差过大将产生“三条腿”故障。()
A、正确
B、错误