送电操作前应除去或拆除为检修装设的临时安全措施和临时接地线。
参考答案：对
Luckily, we’d brought a road map, _________ we would have lost our way.
A．without it
B．with that
C．without which
D．without that
属于我国玉雕主要产地是（）
A、北京
B、上海
C、江苏
D、广州
