You are about to enter a compartment to investigate a suspected smoldering fireIf youre not wearing a self-contained breathing apparatus, you should test the compartments atmosphere to determine if there is/are （）.
A. sufficient oxygen to sustain human life
B. an explosive mixture in the compartment
C. a toxic atmosphere in the compartment
D. All of the above
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如果要给字体加删除线，可以选择下列哪种属性（）
A. FontName
B. FontSize
C. FontStrikethru
D. FontUnderLine
行政复议机关作出维持具体行政行为的复议决定需要符合以下条件（）
A. 具体行政行为认定的事实清楚、证据确凿
B. 作出具体行政行为适用的依据正确
C. 作出具体行政行为的程序合法
D. 具体行政行为的内容适当
A vessel constrained by her draught shall，when risk of collision with another vessel in a crossing or head-on situation exists，（）.
A. apply the relevant Steering and Sailing Rules as a power-driven vessel
B. apply the relevant Steering and Sailing Rules as a Sailing vessel
C. apply the relevant Steering and Sailing Rules as a vessel not under command
D. apply the relevant Steering and Sailing Rules as a vessel engaged in a towing operatio
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