下列哪些属于建筑施工特种作业()
A.建筑电工
B.建筑架子工
C.建筑起重信号司索工
D.高处作业吊篮安装拆卸工
参考答案:A, B, C, D
The shoes are made_________ leather and are suitable _________going for a walk.
A.from; of
B.of; to
C.from; to
D.of; for
如果SDCU故障会发生什么()
A.厕所烟雾探测失效;
B.货舱烟雾探测失效;
C.A+B+单声警告+主警戒灯亮+ECAM信息。