《本安体系》桥式吊车作业管理规定：桥式吊车驾驶室内，冬天可装有（）取暖设备，不准用煤火炉或电炉取暖。
A、电气
B、煤火炉
C、电炉
参考答案：A
-Would you have your family get-together this New Year's Day?
-_________ We are busy working now. [ ]
A. No way
B. Not possible
C. Not chance
D. Not at all
CEA增加见于（）
A.结肠癌
B.肠结核
C.肝癌
D.胃溃疡
E.克罗恩病
