[多选题]列关于可燃气探测仪的表述中,正确的是( )。
A.进入现场前要严格做好个人安全防护。
B.进入事故现场禁止随身携带可能产生静电火花的物品。
C.使用过程要轻拿轻放,严防摔碰、挤压,注意防水、防腐蚀、防热烤日晒。
D.切勿擅自拆卸仪器,以免造成仪器损坏。
E.进入现场前要认真检查仪器工作状态。

某写字楼项目，建筑面积84540.4m2，两层连通整体地下室，地上为两栋塔楼，基础形式为筏板基础，结构体系为全现浇钢筋混凝土剪力墙结构，地下结构设计为2mm+2mm高聚物改性沥青卷材外防水。地下结构施工过程中，发生如下事件：
事件一：地下室底板外防水设计为两道，置于混凝土垫层上。施工单位拟采用热熔法、均满粘施工，监理工程师认为施工方法存在不妥，不予确认。
事件二：地下室单层面积较大，由于设备所需空问要求，地下二层层高达6.6m，不便于一次施工，故底板、竖向墙体及顶板分次浇筑。监理要求提前上报施工缝留置位置。
事件三：底板施工完后，浇水养护10d后监理工程师提出应继续浇水，施工单位认为采用普通硅酸盐水泥拌制的混凝土，其养护时间不少于7d即可，现养护10d已完全满足规范。
事件四：地下室防水层保护层做法：顶板与底板一致，采用50mm厚细石混凝土；侧墙为聚苯乙烯泡沫塑料。室内厕浴间防水做法：采用聚氨酯防水，先施工四周墙面，然后施工地面；基层采用1：2混合砂浆找平并压光后施工防水层，再做防水保护层。监理对此做法提出诸多不同意见。

When lab rats sleep, their brains revisit the maze they navigated during the day, according to a new study (1) yesterday, offering some of the strongest evidence (2) that animals do indeed dream. Experiments with sleeping rats found that cells in the animals’ brains fire in a distinctive pattern (3) the pattern that occurs when they are (4) and trying to learn their way around a maze.
Based on the results, the researchers concluded the rats were dreaming about the maze, (5) reviewing what they had learned while awake to (6) the memories.
Researchers have long known that animals go (7) the same types of sleep phases that people do, including rapid-eye-movement (REM) sleep, which is when people dream. But (8) the occasional twitching, growling or barking that any dog owner has (9) in his or her sleeping pet, there’s been (10) direct evidence that animals (11) A. sleeping
B. dreaming
C. awake
D. aware