为什么配合饲料配方时需要考虑原料的消化利用率？
墙边开关安装高度可选择（）米。 ["0.15","1.3","1.4","1.5","1.8"]
Explosions do occur （） caused by the ignition of oil or vapour gaining access from compressors or defective engine starting valves. ["in boiler drums","in refrigerating plants","in starting air pipes","in air cooler"]
以下哪个工具可以不受图层调板上透明锁定的影响，并且在使用后可以自动将图像的背景层转换为普通层？（） ["Clone Stamp tool（克隆图章工具）","Eraser Tool（橡皮擦工具）","Background Eraser Tool（背景橡皮擦工具）","Magic Eraser Tool（魔术橡皮擦工具）"]
鸦片战争时期清政府与西方国家签订的不平等条约有（）。 ["《南京条约》","《虎门条约》","《黄埔条约》","《中法条约》","《马关条约》"]
不履行法定工作职责包括哪些情形？
